Auto-Trail • Excel • 2011

265138 FAQs9 Types
Official manual on Auto-Trail's site:View PDF ↗
Auto-Trail

Chassis & Running Gear (Excel, 2011 Model Year)

Chassis / Towing Control
2000 FAQs
View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
Folding step feels loose, wobbles, or won't retain securely when closed
Worn step pivots or a worn/damaged retaining mechanism.Check the step pivots for wear, and confirm the step stays firmly retained once it's folded shut. Where a warning light is fitted, make sure that switch still operates as expected.DIY Safe
N/A
Corner steady wobbles, feels loose, or is stiff to wind out
A loose chassis attachment, or a dry/stiff screw thread on the steady itself.Check that the corner steadies' chassis attachments are secure, and make sure each steady winds out smoothly without wobbling once extended. If they've become stiff, a light lubrication of the screw thread usually sorts it.DIY Safe
Thetford

SOG70-SOV70 / SOG52-SOV52

Kitchen
02013 FAQs
View full Thetford page →

Technical Specifications

Gas Or Pressure28-30 mbar (Butane), 37 mbar (Propane)

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
Burner does not ignite
Gas supply closed, air in the gas line, or incorrect gas pressureCheck that the gas supply is open, inspect the gas cylinder, and ensure correct pressure. If the issue remains unresolved, contact an authorised service agent.DIY Check / Tech Fallback
N/A
Appliance fails to stay lit after ignition
Thermocouple faulty, dirty, or not heated sufficientlyHold the control knob depressed longer during ignition to heat the thermocouple. If the fault persists, have repairs carried out by a specialist.DIY Check / Tech Fallback

Frequently Asked Questions

Q: What type of gas do I need?

Only operate the stove with the type of gas (propane or butane) and pressure, as indicated on the rating plate.

Q: What can I do when the flame goes off after igniting the oven?

If the burner hasn't caught within 15 seconds, let go of the knob and leave it for at least a minute before you try again. If it still won't light, get in touch with your dealer.

Q: Why is the cooking appliance too hot to touch?

The appliance is manufactured to heat food and as a result certain areas will become hot. Touchable surfaces like knobs and handles should remain within a safe touchable temperature. If you are concerned about these temperatures, please contact your dealer who can measure the temperatures to ensure they are correct.

Q: Why do I need to keep the door open for grilling?

The grill burner works efficiently with the correct circulation of gas and ambient air. Closing the door prevents the circulation of this air and can result in dangerous products of combustion.

Q: How does the grill function on my oven work?

Does your oven have a grill / grill function? Note that the grill function may only be operated with the grill door open. The following applies here: Grill switched on – grill door opened or tilted Grill switched off – grill door closed Note: More and more Thetford appliances with a grill have a safety device that prevents the grill from operating when the grill door is closed. As soon as the grill door is closed, the gas flame goes out.

Q: How can I clean my cooking appliance (glass / glass lid)?

Wipe up any spills or mess straight after cooking, using hot soapy water, then wipe it dry with something soft. For tougher dirt or grease, use a dedicated glass cleaner.

Q: How can I clean my cooking appliance (enamelled)?

Wipe up any spills or mess straight after cooking, using hot soapy water, then wipe it dry with something soft. For tougher dirt or grease, use a non-abrasive cream cleaner.

Q: Why do the knobs fall off?

There may be a flat metal retaining clip that has broken from the knob. Please contact your dealer who can replace under warranty or supply this if the appliance is outside the 3 year warranty.

Q: What happens if the oven/grill doesn’t work?

If the burner hasn't caught within 15 seconds, let go of the knob and leave it for at least a minute before you try again. If it still won't light, get in touch with your dealer.

Q: Where can I get an extra shelf for my oven?

Spares are available from your local dealer or service centre. Spares are also available from a range of wholesaler outlets including Leisure Spares 01423 320009.

Q: My grill doesn’t appear to light in the middle.

It shouldn’t. This is the design to promote even cooking.

Q: My grill pan handle gets hot, what can I do?

The handle is detachable. It should be removed whilst the grill is in use.

Q: What are the requirements for installing the cooker?

The cooker should be installaed as per the manufactures recommended installation instructions and should only be installed by competent qualified persons. Local laws should be adhered to when installing gas appliances.

Thetford

Spinflo S330 Hob (as fitted to Auto-Trail motorhomes)

Hob / Cooker
1100 FAQs
View full Thetford page →

Technical Specifications

Burners3, electronically ignited, fully adjustable from full flame to simmer
Max Pan Size200mm on the outer burners, 180mm on the centre burner

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
Burner doesn't light within about 15 seconds of holding the control knob in
Air in the gas line, a closed gas supply, or a dirty/wet burner.Release the control knob and wait at least 1 minute before trying again - repeated immediate attempts can flood the burner. Check the gas cylinder valve is open and the isolation valve is in the ON position. If it still won't light after a couple of tries, check the burner for dirt or moisture.DIY Safe
N/A
Burner lights but doesn't stay lit
A dirty or wet burner, or low gas pressure.Clean and dry the burner components. If the problem persists, contact an authorised Thetford service agent.DIY Check / Tech Fallback
Note: more than one Battery Charger / Power Management is listed below for this exact vehicle edition. This isn't a mistake - manufacturers sometimes fit either option depending on the production run - but it means your vehicle almost certainly only has ONE of these, not both. Check your own appliance's badge/model plate against the entries below to find the right one.
Sargent

EC300 Series Systems

Battery Charger / Power Management
3006 FAQs
View full Sargent page →

Technical Specifications

Battery Chargerup to 300 watts
Solar Panel Regulatorup to 120 watts

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
EC325, EC328 or EC300 control panel's battery current reading doesn't look right
The PSU's current sensor has fallen out of calibration with the control panelIf you've got a solar panel fitted, cover or disconnect it first (or do this at night) so it doesn't throw off the calibration. Turn the mains charger off using the switch at the PSU's top right (skip this if you're not on hook-up), and switch off the control panel's power button (top-left) to disconnect the van's leisure loads - the fridge stays powered even with the panel off, so switch that off locally too. Note the software version shown on the main screen, then scroll down to the battery current display and press and hold select (the middle button) - after a few seconds it'll show 'Calibrating Please Wait' before returning to the current screen. On V1.x software (V1.2-V1.4), hold select once more to save the new values; V2.x and above doesn't need this extra step. Once done, the display should read 0.0A once the backlight times out (a reading of -0.1A with the backlight on is normal). Turn the panel back on and switch a few lights on to see a negative reading, then switch the charger on to watch it go positive as the battery charges.DIY Safe
N/A
The EC480 panel's battery amp-hour (AH) reading looks wrong - typically because the leisure battery's been charged away from the van, or a bigger/extra battery has been fitted
The AH calculation is out of sync due to independent battery charging or a battery change, requiring a reset of the AH start point.Turn off the van's 12V supply, then go to the screen showing the manufacturer's logo (e.g. Autotrail) and press the Up and Down arrows at the same time to enter programming mode, navigate to (b) AH Start Point, and use Select (<) to set it to your battery's estimated charge level (100% if fully charged). Scroll to 'Exit Advanced' and press Select to leave.DIY Safe
N/A
EC480 or EC300 panel is showing an inaccurate current (A) reading - can happen after fitting a replacement control panel
The ammeter within the EC500 PSU is uncalibrated relative to the control panel.Turn off the van's 12V supply and the battery charger, and cover any solar panels if you can. Go to the active battery screen (on an EC300, the Battery Current screen), then press and hold Select (<) to begin calibration - the 'A'/'Batt Amps' reading will reset to 0, and once done the display should read correctly again.DIY Safe

Frequently Asked Questions

Q: Is it possible to charge the vehicle (starter) battery using my system?

Whether you can depends on which type of Sargent PSU system you have - manual-charging or CAN-bus based.

On systems that only charge manually - PSU2007 with EC200, EC328, EC325, EC225 with EC100, EC176 with EC361/2/3, and EC155 with EC50/51 - the leisure battery is charged by default: with the control panel switched off, the mains charger starts charging the leisure battery the moment it's plugged in, and with the panel on, it keeps the leisure battery topped up while also powering the leisure loads. To charge the vehicle battery instead, switch the control panel on and pick the vehicle battery - the charger then charges that battery along with any leisure loads left switched on. Note that EC100, EC200, EC325 and EC50/51 panels won't allow the vehicle battery to be selected below 10.9V, while EC328 panels (software V2.21) will allow it above 2V provided the mains charger is on. If mains power is lost while charging the vehicle battery, leisure loads will start drawing from it instead - switching back to the leisure battery once the vehicle battery either falls below the 10.9V cut-off or, if it started above that, once it recovers back up to 10.9V. The leisure battery itself has its own 9V cut-off that disconnects leisure loads to stop it discharging further.

CAN-bus systems (the EC800, EC700, EC600, EC500, EC450 and EC400) include a smart-charge feature instead, on by default but switchable off. With the mains charger on, it defaults to charging the leisure battery while keeping an eye on the vehicle battery - if that drops below 12.4V, charging switches to it for 4 hours, then returns to the leisure battery for another 4 hours, repeating the cycle for as long as the vehicle battery stays low. This runs regardless of whether the control panel is on, as long as the system's own shutdown button is switched in (unless you've disabled the feature) - and if the panel is on, you can manually pick whichever battery you want charged at any point in the cycle.

Q: How do I calibrate the EC480 battery amps and battery size?

Turn off the van's 12V supply, then go to the screen showing the manufacturer's logo (e.g. Autotrail) and press the Up and Down arrows at the same time to enter programming mode, then navigate to (a) Battery Size - set to the right capacity - and (b) AH Start Point - which should be your battery's estimated charge, i.e. 100% if fully charged - using Select (<) to adjust each. Scroll to 'Exit Advanced' and press Select to leave.

Q: Can I fit a Lithium battery to my system?

Most Sargent systems use a PX300 or PF200 battery charger. If yours has a different charger fitted, check with that charger's own manufacturer for Lithium compatibility. The PX300's charging profile suits many leisure-industry Lithium batteries that have their own internal Battery Management System (BMS) - its charging profile and voltages are available as a downloadable attachment on the PX300's own product page, though you'll still need to confirm suitability directly with your chosen battery's manufacturer.

Systems that use a PX300 include the EC800, EC700, EC600, EC500, EC400 series, EC400+ and EC328. If your system doesn't have a PX300, its charger will run a fixed 13.8V, which generally isn't suitable for fully charging a Lithium battery - and switching to Lithium may also mean you need a DC-DC charger to keep the charging current within limits.

Q: Can I fit a second leisure battery to my Auto-Trail motorhome?

On an Auto-Trail, adding an extra leisure battery is normally simple - every current model and most older ones already have a dedicated connector, so the extra battery harness just plugs in.

Ideally pick a second battery of the same make, type and capacity as the one you have. If that's not possible, at least keep the capacity the same and never mix battery types (for example, don't pair a 'wet' battery with an AGM one).

Sargent sells the harness through its web shop (https://sargentltd.co.uk/shop/product/auto_trail_additional_battery_harness_2011-2016/229). It's the newer type, fitted to Auto-Trail vans from 2011, but it suits older vans too because the battery connector hasn't changed.

To fit it:

  1. Connect the harness to the new battery, making sure both terminals are tight and their covers are back on.
  2. Secure the battery in its box or compartment (this varies by year and model) without trapping the harness.
  3. Take the protective cap off the vehicle's spare battery connector.
  4. Plug the new battery in.

With an EC328 or EC700 system, that's it - the extra battery is ready to charge and use.

With an EC500 and the EC480 colour LCD panel, also set the battery size to the new total in the advanced settings (two 100Ah batteries means 200Ah), then recalibrate the current sensor.

To change the battery size:

  1. On the home screen showing the brand logo, press both the up and down arrows at once and keep them pressed.
  2. Let go once the screen changes.
  3. Scroll to 'Battery Size' and use select to raise it to the new total.
  4. Go back up to 'Exit Advanced', then press select to return to normal use.

Don't worry if the Ah reading drops afterwards - it takes a few charge and discharge cycles to line up with the real capacity, which is normal.

To recalibrate the current sensor:

  1. Turn the charger off, and switch the control panel off at its power button.
  2. Go to the active battery screen.
  3. Hold select until 'calibrating please wait….' appears.
  4. Let go - calibration is done.

Q: Can I fit a different make of AGM battery?

We don't endorse any particular make or model, but the PX300 charger (fitted across the EC400/EC400+, EC500, EC600, EC700, EC800 and EC328 systems) suits the great majority of good-quality AGM batteries sold in the UK. Its charge profile is included in the instruction manual attached to its product page - if you're at all unsure whether a battery is compatible, check with that battery's own distributor or manufacturer first.

Q: Can I connect additional solar panels to my system?

How much solar you can add through the PSU comes down to the fuse protecting that circuit, which varies by system - the maximum recommended wattage through the PSU is 120W for EC325/EC328/EC500/EC600, 80W for EC400, and 150W for EC700/EC800/EC400+. You can go beyond that by wiring extra panels straight onto the leisure battery via their own regulator and a correctly-sized fuse, though you'll lose the ability to see that extra solar's output on the control panel.

Any system without a PSU solar input at all needs its solar wired directly onto the leisure battery this way regardless - and there's no upper wattage limit when connecting straight to the battery like this.

Sargent

EC500 Series Systems

Battery Charger / Power Management
3007 FAQs
View full Sargent page →

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
Water pump automatically switches off after roughly 10 minutes, and needs the pump button toggled off then on at the panel to start working again
The Autofill option is switched on in the EC445 PSU, causing the system to treat the water pump as a filler pump.At the PSU, keep pressing the yellow button until the TANKFILL screen shows, then press the red button until the display shows 'OFF' - the pump will then stay running for as long as its button is switched on.DIY Safe
N/A
Leisure batteries keep discharging, or don't hold their charge as long as they should
In the vast majority of cases, this comes down to a faulty or under-performing battery - even a brand new one can be the culprit.Before testing, give the leisure battery a full charge of 24 hours or more, turn the charger off, disconnect or cover the solar panel so it can't affect readings, and disconnect the Stinger alarm if one's fitted - if two batteries are fitted, test them one at a time. To check the PSU's own draw, fit an ammeter or plug-in meter where the leisure battery fuse normally sits: with the PSU's shutdown button out the reading should be zero (anything else means extra equipment is drawing current and should be disconnected); with the button in, compare the reading against the system's published Power OFF figures; and with the button in and the panel switched on (everything else off), compare against the Power ON figures. To check the charger, note the battery voltage on the panel or at the terminals (expect around 12.7V, or 13-13.5V if recently charged), switch the mains charger on and watch the voltage rise and settle at 13.6V float, then switch on some lights and confirm it shifts to 14.4V. To check the battery's actual capacity, switch the panel on, turn on enough lights to draw about 5A, and time how long it takes to discharge down to 10V (when the panel warns and cuts the power) - multiply the discharge current by the elapsed hours to get the real Ah delivered, and repeat the test if the result looks low. A battery that keeps testing poorly should go back to its supplier or manufacturer for proper discharge testing.DIY Safe
N/A
Ammeter still shows a reading even with the PSU shutdown button pulled out
Something's been added to the system since the original installation and is drawing current that shouldn't be thereDisconnect this extra equipment.DIY Safe

Frequently Asked Questions

Q: Is it possible to charge the vehicle (starter) battery using my system?

Whether you can depends on which type of Sargent PSU system you have - manual-charging or CAN-bus based.

On systems that only charge manually - PSU2007 with EC200, EC328, EC325, EC225 with EC100, EC176 with EC361/2/3, and EC155 with EC50/51 - the leisure battery is charged by default: with the control panel switched off, the mains charger starts charging the leisure battery the moment it's plugged in, and with the panel on, it keeps the leisure battery topped up while also powering the leisure loads. To charge the vehicle battery instead, switch the control panel on and pick the vehicle battery - the charger then charges that battery along with any leisure loads left switched on. Note that EC100, EC200, EC325 and EC50/51 panels won't allow the vehicle battery to be selected below 10.9V, while EC328 panels (software V2.21) will allow it above 2V provided the mains charger is on. If mains power is lost while charging the vehicle battery, leisure loads will start drawing from it instead - switching back to the leisure battery once the vehicle battery either falls below the 10.9V cut-off or, if it started above that, once it recovers back up to 10.9V. The leisure battery itself has its own 9V cut-off that disconnects leisure loads to stop it discharging further.

CAN-bus systems (the EC800, EC700, EC600, EC500, EC450 and EC400) include a smart-charge feature instead, on by default but switchable off. With the mains charger on, it defaults to charging the leisure battery while keeping an eye on the vehicle battery - if that drops below 12.4V, charging switches to it for 4 hours, then returns to the leisure battery for another 4 hours, repeating the cycle for as long as the vehicle battery stays low. This runs regardless of whether the control panel is on, as long as the system's own shutdown button is switched in (unless you've disabled the feature) - and if the panel is on, you can manually pick whichever battery you want charged at any point in the cycle.

Q: What are the differences between the EC400 series PSU and control panel versions?

When the EC400 launched in 2010, it came with two PSU variants (the entry-level EC440 and the higher-spec EC445) and two matching control panels (the entry-level EC441 and higher-spec EC446). The EC445/EC446 pairing was fitted to caravans with an on-board water tank and multiple fill arrangements - the EC445 got an LCD screen for settings like 'Autofill', and the EC446 panel added a water level display.

The EC440/EC441 pairing went into caravans with no internal water tank at all, so neither had those extras. Some mid-range vans without a tank but with the option to add one later got the EC445 PSU paired with the simpler EC441 panel instead.

Q: How do I calibrate the EC480 battery amps and battery size?

Turn off the van's 12V supply, then go to the screen showing the manufacturer's logo (e.g. Autotrail) and press the Up and Down arrows at the same time to enter programming mode, then navigate to (a) Battery Size - set to the right capacity - and (b) AH Start Point - which should be your battery's estimated charge, i.e. 100% if fully charged - using Select (<) to adjust each. Scroll to 'Exit Advanced' and press Select to leave.

Q: Can I fit a Lithium battery to my system?

Most Sargent systems use a PX300 or PF200 battery charger. If yours has a different charger fitted, check with that charger's own manufacturer for Lithium compatibility. The PX300's charging profile suits many leisure-industry Lithium batteries that have their own internal Battery Management System (BMS) - its charging profile and voltages are available as a downloadable attachment on the PX300's own product page, though you'll still need to confirm suitability directly with your chosen battery's manufacturer.

Systems that use a PX300 include the EC800, EC700, EC600, EC500, EC400 series, EC400+ and EC328. If your system doesn't have a PX300, its charger will run a fixed 13.8V, which generally isn't suitable for fully charging a Lithium battery - and switching to Lithium may also mean you need a DC-DC charger to keep the charging current within limits.

Q: Can I fit a second leisure battery to my Auto-Trail motorhome?

On an Auto-Trail, adding an extra leisure battery is normally simple - every current model and most older ones already have a dedicated connector, so the extra battery harness just plugs in.

Ideally pick a second battery of the same make, type and capacity as the one you have. If that's not possible, at least keep the capacity the same and never mix battery types (for example, don't pair a 'wet' battery with an AGM one).

Sargent sells the harness through its web shop (https://sargentltd.co.uk/shop/product/auto_trail_additional_battery_harness_2011-2016/229). It's the newer type, fitted to Auto-Trail vans from 2011, but it suits older vans too because the battery connector hasn't changed.

To fit it:

  1. Connect the harness to the new battery, making sure both terminals are tight and their covers are back on.
  2. Secure the battery in its box or compartment (this varies by year and model) without trapping the harness.
  3. Take the protective cap off the vehicle's spare battery connector.
  4. Plug the new battery in.

With an EC328 or EC700 system, that's it - the extra battery is ready to charge and use.

With an EC500 and the EC480 colour LCD panel, also set the battery size to the new total in the advanced settings (two 100Ah batteries means 200Ah), then recalibrate the current sensor.

To change the battery size:

  1. On the home screen showing the brand logo, press both the up and down arrows at once and keep them pressed.
  2. Let go once the screen changes.
  3. Scroll to 'Battery Size' and use select to raise it to the new total.
  4. Go back up to 'Exit Advanced', then press select to return to normal use.

Don't worry if the Ah reading drops afterwards - it takes a few charge and discharge cycles to line up with the real capacity, which is normal.

To recalibrate the current sensor:

  1. Turn the charger off, and switch the control panel off at its power button.
  2. Go to the active battery screen.
  3. Hold select until 'calibrating please wait….' appears.
  4. Let go - calibration is done.

Q: Can I fit a different make of AGM battery?

We don't endorse any particular make or model, but the PX300 charger (fitted across the EC400/EC400+, EC500, EC600, EC700, EC800 and EC328 systems) suits the great majority of good-quality AGM batteries sold in the UK. Its charge profile is included in the instruction manual attached to its product page - if you're at all unsure whether a battery is compatible, check with that battery's own distributor or manufacturer first.

Q: Can I connect additional solar panels to my system?

How much solar you can add through the PSU comes down to the fuse protecting that circuit, which varies by system - the maximum recommended wattage through the PSU is 120W for EC325/EC328/EC500/EC600, 80W for EC400, and 150W for EC700/EC800/EC400+. You can go beyond that by wiring extra panels straight onto the leisure battery via their own regulator and a correctly-sized fuse, though you'll lose the ability to see that extra solar's output on the control panel.

Any system without a PSU solar input at all needs its solar wired directly onto the leisure battery this way regardless - and there's no upper wattage limit when connecting straight to the battery like this.

Auto-Trail

Gas Supply System (Excel, 2011 Model Year)

Gas Regulator / Supply
2000 FAQs
View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
The gas flame lifts clear of the burner instead of sitting on it.
Gas pressure is too highGo back over the regulator, gas cylinders, and pipework, and make any adjustments needed.DIY Safe
N/A
Yellow flame causing soot
Gas pressure is too lowGo back over the regulator, gas cylinders, and pipework, and make any adjustments needed.DIY Safe
Webasto

Dual Top Diesel Heater (as fitted to Auto-Sleepers Cotswold 2009 and Auto-Trail Excel 2011)

Heating System (Space/Water)
2112 FAQs
View full Webasto page →

Technical Specifications

FuelDiesel (drawn from the vehicle fuel tank), with a mains electricity heating element
ModesSummer (hot water only, 40°C or 70°C), Winter (space heating only, 5-35°C), Winter with hot water (space heating plus 70°C water)
Fuse Rating15A (heater reset fuse)
Max Boiler Pressure2.5 bar (fit a pressure-reduction valve on mains/site water hook-up)

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
The power/fault indicator is blinking red with a fault message on the display
A specific fault code explained in the troubleshooting chapter (chapter 8) of the heater manufacturer's own instruction book - not repeated here in this vehicle handbook.Start by checking that the plug connections and fuses are sound and secure. Press OK to acknowledge the message, or reset the heater by switching it off for 5 seconds or longer. Get it looked at by Webasto-trained personnel if the fault keeps coming back.DIY Check / Tech Fallback
N/A
The heater has locked out after a serious fault (e.g. overheating or repeated failure to start)
A serious malfunction has put the heater into a locked-out safety state.Wait until the heater/ventilator has completely stopped running, switch it off at the on/off button, take out the 15A fuse, leave it out for at least 5 seconds, then put it back - that resets the heater and clears the lockout.DIY Safe
N/A
The 230V RCD trips repeatedly whenever one of the heater's 230V modes is in use
A fault with the heater on the electric heating element side.Get in touch with your dealer or a Webasto-approved service centre.Professional Intervention Required
N/A
Black smoke is coming from the heater exhaust
The combustion air system or the exhaust system is blocked.Check both systems for blockages - a blocked exhaust or combustion air system can make the heater unsafe to run, so stop using it until this is cleared.DIY Safe

Frequently Asked Questions

Q: How often should I disinfect the water heater side of the system?

At least annually, disinfect the water system with a Sodium Hypochlorite solution (Certisil or Puriclean, for example), following its instructions closely. Water left below 60°C can grow micro-organisms, so don't leave water sitting in the boiler for more than around two weeks without disinfecting it - and if it's been unused for a week or longer, drain and rinse the system thoroughly first.

Q: Is it OK to just leave the heater switched off all winter?

No - every four weeks, run it for 20 minutes or more on full diesel power (not electric) in Winter mode, heating the cabin without hot water, to keep the mechanical parts moving freely. Then follow that with at least 30 minutes in Summer mode at 70°C to exercise the hot-water side too.

Dometic

RM7000 Series

Fridge / Freezer
4008 FAQs
View full Dometic page →

Technical Specifications

Electrical12V DC, 230V AC; 12V lighting power: 2W; Heating element AC: 125W to 135W / Heating element DC: 120W to 130W
Gas Or PressureLiquid gas (propane/butane), operating pressure 30 mbar (conforming to EN 1949 / EN 572 / EN 732)
Capacities DimensionsGross capacity ranges from approximately 95 liters up to 135 liters depending on model; various dimensions detailed from RM7501 up to RM7565

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
Refrigerator does not function on gas mode
Gas bottle empty or gas tap closedReplace gas bottle and open all gas supply isolation valvesDIY Safe
N/A
Refrigerator does not function on 12V DC
Blown 12V fuse or battery not chargedReplace fuse or recharge/check vehicle battery and engine connectionDIY Safe
N/A
Refrigerator does not function on 230V AC
Blown 230V fuse or external power disconnectedReplace fuse or verify external mains power supply connection; on AES-equipped units, insufficient supply voltage can make the fridge switch itself over to gas operation automatically, reverting to 230V once voltage is adequate again.DIY Safe
N/A
Refrigerator does not cool sufficiently
Inadequate ventilation of the unit or incorrect thermostat settingCheck the ventilation grilles aren't covered, set the thermostat higher, check the door seals properly when shut if the condenser has iced up, let warm food cool before it goes in, and if the fridge has only just been switched on, give it several hours before checking again.DIY Safe

Frequently Asked Questions

Q: What does the SN climate class on my Dometic RM fridge mean?

Climate class SN (which Dometic calls 'Extended Temperate') means the fridge is designed to work reliably when the air temperature is from +10°C up to +32°C (taken at the bottom vent grille, outside the vehicle).

Q: How well does an absorption fridge cool in hot weather?

In a hot summer the outside temperature often reaches about 32°C - the top of the fridge's rated range - and once it climbs higher, the temperature inside the fridge will inevitably rise. An absorption fridge needs a heat source to move its refrigerant around the cooling unit (which is why it can run on 12V, 230V or gas), so it has to get rid of the heat from its power source as well as the heat drawn out of the food compartment.

To help it in hot weather: park where the fridge vents get as much shade as possible during the day; unclip the outside vent grilles to improve airflow; and if you regularly travel somewhere hot, consider having a ventilator kit (a fan fitted behind the fridge) installed to boost the airflow - Dometic lists these among its accessories.

Q: What can replace my old Dometic RM fridge?

Dometic's 2023 'New for old - simply swap' guide covers both its absorption and compressor fridges, showing which current models replace older ones. It's available from the catalogues section of Dometic's website.

Q: My fridge won't work on mains (AC) power - what should I check?

Check the fuse in the mains supply and replace it if it has blown, and make sure the vehicle is actually plugged into a mains supply. If both are fine, the AC heating element may have failed - that needs an authorised Dometic service centre.

Q: My fridge won't work on 12V (DC) - what should I check?

Possible causes, and what to do: the vehicle's own fuse has blown - replace it (see the vehicle's handbook); the vehicle battery is flat - test it and recharge it; the ignition is off - switch it on. If the fuse in the fridge's DC cable has blown (the fuse on the relay) or the DC heating element has failed, contact an authorised Dometic service centre.

Q: My fridge won't work on gas - what should I check?

Check the gas cylinder isn't empty (change it if it is) and that the gas valve is turned on. If air has got into the gas pipe, turn the fridge off and on again, repeating this three or four times if needed; if a gas hob or cooker is fitted, switch that on, then try the fridge again if needed.

Q: Why is my fridge running on gas in automatic mode when I'm plugged into mains?

The mains voltage is too low. The fridge switches back to mains by itself once the supply voltage recovers.

Q: Why isn't my fridge getting cold enough?

Work through the likely causes: the cooling unit isn't getting enough air - make sure the outside vent grilles aren't blocked; the evaporator has iced up - check the door shuts properly and the seal is seated and undamaged, then defrost the fridge; the temperature setting is too warm - turn it to a colder setting; it's very hot outside - take the vent grille off for a while so hot air can escape faster; too much food, or too much warm food, went in at once - take some out, and let warm food cool before putting it back; the fridge was only switched on recently - give it four to five hours, then recheck the temperature.

Auto-Trail

Smoke & CO Alarms (Excel, 2011 Model Year)

Smoke / CO Alarm
2000 FAQs
View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
The smoke alarm gives a brief beep every minute.
The battery is worn out and needs replacing.Replace the battery immediately. (Low voltage warning sounds for approximately seven days).DIY Safe
Recommended partsAffiliate linksView 2 optionsHide

Check which battery your smoke alarm takes (look at the battery fitted now), then choose the matching one:

The handbook says the smoke alarm is battery-operated but doesn't name the battery type, so check yours before ordering.

9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon
View on Amazon →
AA batteriesDuracell Plus AA Alkaline Batteries (12 Pack) 1.5V, LR06~£9.00 for 124.7★ (71,000+ ratings), dispatched/sold by Amazon
View on Amazon →
N/A
The smoke alarm's LED doesn't blink once a minute as it normally would.
Battery is completely flatReplace the battery immediately.DIY Safe
Recommended partsAffiliate linksView 2 optionsHide

Check which battery your smoke alarm takes (look at the battery fitted now), then choose the matching one:

The handbook says the smoke alarm is battery-operated but doesn't name the battery type, so check yours before ordering.

9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon
View on Amazon →
AA batteriesDuracell Plus AA Alkaline Batteries (12 Pack) 1.5V, LR06~£9.00 for 124.7★ (71,000+ ratings), dispatched/sold by Amazon
View on Amazon →
Auto-Trail

Toilets & Sanitation (Excel, 2011 Model Year)

Toilet
0001 FAQ
View official manual on manufacturer's site ↗

Frequently Asked Questions

Q: How do I prepare the Thetford cassette waste-holding tank before using the toilet?

Pull the safety catch upward to release the waste-holding tank, then slide it out, tipping it slightly as it comes free. Stand it upright with the emptying spout facing up, unscrew the cap, and pour in the recommended amount of Thetford toilet fluid plus about 2 litres of water to cover the base. Screw the cap back on, return the spout to its stored position, then slot the tank back in through the access door and re-secure the safety catch.

Auto-Trail

Water System (Excel, 2011 Model Year)

Water System Component
2001 FAQ
View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
The water pump keeps running for more than 5 to 10 seconds after every tap has been shut off.
Possible leak in the systemCheck the whole water system for leaks without delay, and make a habit of powering the pump down from its control panel every time you leave the vehicle.DIY Safe
N/A
Aerated water from a tap
There may be a leak on the pump's suction side.Look for a leak where the pump draws water in and repair as needed.DIY Safe

Frequently Asked Questions

Q: How do I drain down the water system for winter or storage?

Open the fresh water tank's drain valve, then the wastewater tank's (into a suitable container), then leave every tap inside the vehicle open (mixer taps set to their central position). There's also an internal drain valve that clears the water heater and its own pipework - open that too, give the vehicle five minutes to finish draining, then briefly run the pump to clear any water left in it. Empty the cassette toilet too.

Truma

Ultrastore Water Heater

Water Heater
5100 FAQs
View full Truma page →

Technical Specifications

TypeLiquid gas (LPG) operated storage water heater with an additional 230V electric heating element
Max Water Pressure2.8 bar (use a pressure reducer when connected to a central/mains water supply)

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningPossible CauseStep-by-Step DIY FixSuggested Actions
N/A
The heater switches on but doesn't run (gas operation)
No 12V supply, or a window above the cowl is open.Check the power supply is at least 10.5V, check the water heater's fuse, and shut any window that's above the cowl.DIY Safe
N/A
The heater switches on but doesn't run, and the red lamp comes on (gas operation)
Cowl cover fitted, air in the gas supply, no gas supply, or incorrect gas pressure.Take off the cowl cover and/or clear any blockage. Check the gas valves and gas bottle. Switch the appliance off for 5 minutes and back on to unlock it and purge any trapped air.DIY Safe
N/A
The heater runs for a while, then the red lamp comes on (gas operation)
Over-temperature thermostat has operated.Top up the water content if needed (close the drain valve first). Switch the appliance off for 5 minutes and back on to unlock it.DIY Safe
N/A
The heater won't run once switched on (electrical operation)
No 230V supply voltage, or the over-temperature thermostat has operated.Connect to the site's mains supply and/or check the residual current breaker. Top up the water content if needed (close the drain valve first). The electric heating element has its own excess-temperature cut-out - use the control panel to turn it off, wait 5 minutes, then turn it back on.DIY Safe
N/A
The safety/drain valve is dripping water
Water pressure too high.Check the water pressure doesn't exceed 2.8 bar - fit a pressure reducer if it's on mains water.DIY Safe
N/A
Hot water comes out when the cold tap is opened
Hot water flows back through the cold water supply.Fit a non-return valve on the cold supply as the installation instructions describe. If it keeps happening, contact Truma Service.DIY Check / Tech Fallback