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Auto-Sleepers • Ford Transit Custom Air • 2023
488159 FAQs8 Types
Complete guide — 71 diagnostic faults and 9 FAQs across 8 categories, assembled from every category document and cross-referenced part covering this exact edition.
Official manual on Auto-Sleepers's site:View PDF ↗
Awnings & TentsChassis & Running GearCooking & KitchenElectrical & PowerGas SystemsHeatingRefrigeration & CoolingWater & Plumbing
Auto-SleepersAwning (Ford Transit Custom Air, 2023 Model Year)
Awning0001 FAQ
Awning (Ford Transit Custom Air, 2023 Model Year)
AwningFrequently Asked Questions
Q: How do I set up the Thule Omnistor awning?
Fit the crank handle to the right length and slot it into the bayonet socket, then turn it anticlockwise - keeping the handle down - to unroll the awning; it won't move for the first couple of turns. Once you've unrolled about a metre, put the support legs out before continuing. Slide the legs from the front profile, adjust them to height, and fasten them (rolling the fabric up slightly helps tension it, but don't extend the legs so high the fabric jams against the arms).
Fit the tension rafter too on larger models. If it's raining, drop one side so water runs off, and use the hold-down kit in gusty conditions - the front profile locks automatically once it's rolled back up.
Auto-SleepersChassis & Running Gear (Ford Transit Custom Air, 2023 Model Year)
Chassis / Towing Control3003 FAQs
Chassis & Running Gear (Ford Transit Custom Air, 2023 Model Year)
Chassis / Towing ControlMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | A buzzer can be heard behind the dashboard as soon as the ignition is turned on. | Rear electrical entrance step left extended | Fully retract the step. | DIY Safe |
N/A | The power-operated rear step is still out when the ignition gets switched on. | — | A buzzer behind the dashboard sounds the moment the ignition's switched on, and keeps going until the step's been fully retracted. | DIY Safe |
N/A | Dirt and frost preventing the electric step from operating properly | Accumulation of dirt or frost in moving parts | Clean or defrost the moving parts. | DIY Safe |
Frequently Asked Questions
Q: Where can I find the tyre pressures for my Auto-Sleepers campervan?
For anything relating to the base vehicle itself, check the Ford handbook first. Ford's own tyre-pressure label is fixed to the door pillar on the vehicle's left-hand side.
Q: Where is the vehicle production number or chassis number located?
You'll find the vehicle production number on a sticker inside the glove box, and again low down on the Type Approval plate mounted on either front door pillar. The 17-digit chassis number (VIN) is visible at the windscreen's bottom-left corner, and appears once more on the Type Approval plate on the cab door pillar.
Q: How does the electric rear step work?
It's operated by the switch next to the entrance door - hold it until the step is fully extended; don't try to mount it while it's still moving or only partway out, since the lock won't be engaged and you risk damaging the motor. If you drive off with it left out, a buzzer behind the dashboard sounds once the ignition's on and the step retracts automatically.
Dirt or frost can stop it working properly, so keep the moving parts clean and free of ice.
Auto-SleepersCooking Equipment (Ford Transit Custom Air, 2023 Model Year)
Cooking1010 FAQs
Cooking Equipment (Ford Transit Custom Air, 2023 Model Year)
CookingMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Cooker Hotplate not heating up | Over temperature trip activated | Leave to cool down | DIY Safe |
N/A | Cooker Ignition not operating | Spark unit fault | Refer to dealer | Professional Intervention Required |
Auto-SleepersElectrical System (Ford Transit Custom Air, 2023 Model Year)
Electrical15442 FAQs
Electrical System (Ford Transit Custom Air, 2023 Model Year)
ElectricalMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | The 12V socket outlet has no power reaching it. | Fuse blown | Track down the fault and fit a replacement fuse of the identical rating. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Habitation 12V does not operate | Vehicle ignition “on” | Switch “off” ignition | DIY Safe |
N/A | The battery won't hold its charge. | Current being drawn | Make sure every appliance is switched off whenever it isn't in use. | DIY Safe |
N/A | The control panel's display is garbled or behaving erratically. | Follow the control panel's own handling guidance - the software running it may have crashed. | To reboot the control panel: turn off the EC328PSU's own charger and take out fuses 1 and 2 there - both 2x20A, one feeding the leisure battery, the other the vehicle battery - leave them out for around half a minute, refit them, then power the charger up again. As an alternative approach, prise the control panel's bezel free by pulling its bottom centre downward, unplug the multi-way connector, pause for roughly half a minute, then reconnect it and put the bezel back together. | DIY Safe |
N/A | The battery discharges quickly while appliances are running. | Battery not fully charged | Fully recharge battery | DIY Safe |
N/A | 230V system inoperative | RCD/MCB switches tripped out | Reset circuit breakers | DIY Safe |
N/A | RCD/MCB keeps tripping out | An appliance is drawing more current than the circuit allows. | Only 10A is available on this circuit. Consult your dealer. | Professional Intervention Required |
N/A | The reverse polarity light on the PSU is lit. | Generator being used | Seeing the reverse polarity light while running a generator is a normal quirk with certain generator types. Rather than earthing the neutral conductor directly, some generators centre-tap the earth connection instead, which leaves both the neutral and live conductors sitting around 110V above earth - and that 110V difference is what lights the neon polarity indicator. It's usually still safe to keep using the generator, but check its own handbook for confirmation. | DIY Safe |
N/A | Control Panel current reading incorrect | — | To recalibrate the current sensor: turn the charger switch off and the control panel power off too (no LEDs lit), then use the down/left arrow to scroll the display to the battery current reading. Press and hold the select (left arrow) button until 'calibrating...' appears, and keep holding until the current reading comes back, then release. The reading should now be accurate. | DIY Safe |
N/A | The PSU is giving no 12V output. | Other fault | Contact your Dealer | Professional Intervention Required |
N/A | Habitation battery not charging | Contacts dirty/loose on battery terminals | Clean and check for tightness | DIY Safe |
N/A | EC328PSU case becomes hot under heavy loads | Heavy loads causing high operation temperatures | Always keep the ventilation slots free for airflow, and never rest combustible materials against or next to the EC328PSU. If it overheats the PSU will shut down, restarting automatically once it's cooled. | DIY Safe |
N/A | One or more 12V appliances have no power reaching them. | Circuit fuse blown | Track down the fault and fit a replacement fuse of the identical rating. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | The PSU is giving no 230V output. | Other fault | Contact your Dealer | Professional Intervention Required |
N/A | Control Panel contrast poor | Observe control panel handling instructions. | Unclip the control panel's bezel (pull it down at the centre of its bottom edge), but leave the panel plugged in. Use a small jeweller's screwdriver to carefully adjust the contrast preset on the back of the panel. | DIY Safe |
N/A | Control Panel has no display | — | Check the batteries, switch the EC328PSU charger on, and confirm the mains supply is connected. Check the control panel's connecting lead at both the EC328PSU and behind the control panel itself. If that doesn't resolve it, contact your dealer. | DIY Check / Tech Fallback |
N/A | The PSU is giving no 230V output. | The lead linking the site supply to the vehicle isn't plugged in | Check the lead is connected properly - also check the socket where it plugs into the underside of the PSU. | DIY Safe |
N/A | The PSU is giving no 230V output. | RCD switched off | Reset the RCD. | DIY Safe |
N/A | The PSU is giving no 230V output. | RCD not operating correctly | Check the supply polarity; if the RCD keeps failing, contact your dealer, as there's likely an equipment or wiring fault. | DIY Check / Tech Fallback |
N/A | The PSU is giving no 230V output. | MCB switched off | Reset the MCB by switching it off (down) then back on (up); if it keeps tripping, contact your dealer, as there's likely an equipment or wiring fault. | DIY Check / Tech Fallback |
N/A | The PSU is giving no 230V output. | No or deficient supply from the site | Contact the site warden for assistance. | Professional Intervention Required |
N/A | The reverse polarity light on the PSU is lit. | Mains supply reversed | This light is designed to catch a reversed/crossed live and neutral supply on UK-wired sites - if it comes on, suspect a fault with the site's own supply, or its connecting cable. Outside the UK it can light up with no actual fault present, so check with the site warden in that case. | DIY Check / Tech Fallback |
N/A | 12V power switches itself off | — | This is usually the battery-save feature stepping in to protect the vehicle and/or leisure battery, or the engine having been started (in which case equipment gets disconnected automatically to meet EMC requirements). | DIY Safe |
Frequently Asked Questions
Q: What should I do if the low battery alarm goes off?
Plug the vehicle into a 230V mains supply to top up the leisure battery.
Q: What should I do if the low battery alert is triggered on a lithium battery?
Recharge it - either using the onboard charger, or by running the engine.
SargentEC328 Series Systems
Battery Charger / Power Management16330 FAQs
EC328 Series Systems
Battery Charger / Power ManagementTechnical Specifications
Output 230vRCD protected, 3 x MCB outputs of 10, 10 and 6A via 2 x 9 way connector
Input 12v2 x 20A battery inputs via a single 6 way connector
Solar Input1 x dedicated solar panel input (20 to 120W panel) via a 4 way connector
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | The PSU is giving no 230V output. | The hook-up lead from the site to the vehicle isn't plugged in. | Make sure the hook-up lead is plugged in properly, including where it goes into the socket underneath the EC328 PSU. | DIY Safe |
N/A | The PSU is giving no 230V output. | RCD switched off. | Reset the RCD. | DIY Safe |
N/A | The PSU is giving no 230V output. | RCD not operating correctly. | Check the supply polarity - if the RCD still won't reset, contact your dealer, since it's likely an equipment or wiring fault. | DIY Check / Tech Fallback |
N/A | The PSU is giving no 230V output. | MCB switched off. | Reset the MCB: flick it off (down), then back on (up). If it keeps tripping, contact your dealer - an appliance or the wiring is likely at fault. | DIY Check / Tech Fallback |
N/A | The PSU is giving no 230V output. | The site's hook-up isn't supplying power, or not enough of it. | Contact the site warden for assistance. | Professional Intervention Required |
N/A | The PSU is giving no 230V output. | Other fault. | Contact your dealer. | Professional Intervention Required |
N/A | Control panel has no display | Batteries discharged, EC328 PSU charger switch off, or mains supply not connected. | Check the batteries, switch the EC328 PSU's charger on and make sure the mains is plugged in. Then check the control panel's lead is firmly connected at both ends - at the PSU and behind the panel. If the display still won't come on, contact your dealer. | DIY Check / Tech Fallback |
N/A | 12v power turns off | Either the battery-save function has cut in to protect the vehicle and/or leisure battery, or the engine has been started - which disconnects all the equipment automatically to comply with EMC rules. | This is normal protective behaviour in both cases - no fault action needed. | DIY Safe |
N/A | The control panel's display is garbled or behaving erratically. | The control panel's software has probably frozen. | Restart the control panel: switch the EC328 PSU's charger off, pull out fuses 1 and 2 on the PSU (the two 20A fuses for the leisure and vehicle batteries), wait 30 seconds, put them back and switch the charger on again. Or unclip the panel's bezel (pull it down at the centre of its bottom edge), unplug the panel's multi-way connector, wait 30 seconds, plug it back in and refit the bezel. | DIY Safe |
N/A | Control panel contrast poor | Contrast preset needs adjusting. | Unclip the control panel's bezel (pull it down at the centre of its bottom edge), but leave the panel plugged in. Use a small jeweller's screwdriver to carefully adjust the contrast preset on the back of the panel. | DIY Safe |
N/A | Control panel current reading incorrect | Current sensor needs recalibrating. | Switch the charger off and turn the power off at the control panel so no LEDs are lit. Scroll down until the display shows battery current, then press and hold the select (left arrow) button - 'calibrating...' appears; keep holding until the battery current figure comes back, then let go. The reading should now be right. | DIY Safe |
N/A | The PSU is giving no 12V output. | No 230v supply. | Check the 230V supply first: the hook-up lead is plugged in at both ends (including the socket underneath the EC328 PSU), the RCD and MCB are both switched on (reset either one if it has tripped), and the site's own supply is actually live. | DIY Safe |
N/A | The PSU is giving no 12V output. | Charger not switched on. | Turn the charger switch to on (I); it lights up when it is on. | DIY Safe |
N/A | The PSU is giving no 12V output. | Battery not connected and/or charged. | Install a charged battery. | DIY Safe |
N/A | The PSU is giving no 12V output. | The control panel's power switch is off. | Turn the power on at the control panel. | DIY Safe |
N/A | The PSU is giving no 12V output. | Battery flat / battery fuse blown. | Recharge the battery, check the fuses, and confirm charging voltage is actually reaching the battery. | DIY Safe |
N/A | The PSU is giving no 12V output. | Fuse blown. | Check every fuse is sound and that each one is the rating the fuse table specifies. | DIY Safe |
N/A | The PSU is giving no 12V output. | Equipment switched off / unplugged. | Make sure the appliance is switched on and plugged into the 12V supply. | DIY Safe |
N/A | The PSU is giving no 12V output. | PSU overheated / auto shutdown operated. | Switch some things off to reduce the load and let the PSU cool - it restarts by itself once it has cooled. | DIY Safe |
N/A | The PSU is giving no 12V output. | Other fault. | Contact your dealer. | Professional Intervention Required |
N/A | Pump not working | Pump switched off at the control panel, or fuse blown. | Switch the pump on with the pump (tap symbol) button on the EC328 control panel, and check the pump's fuse. | DIY Safe |
N/A | Pump turned off unexpectedly | Fuse blown, or the internal/external pump feed setting is incorrect. | The EC328 control panel switches the inside and outside pump feeds together - make sure the pump (tap button) setting is the one you want, and check the pump's fuse. | DIY Safe |
Auto-SleepersGas Supply System (Ford Transit Custom Air, 2023 Model Year)
Gas Regulator / Supply4031 FAQ
Gas Supply System (Ford Transit Custom Air, 2023 Model Year)
Gas Regulator / SupplyMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | The appliance lights but goes straight out again as soon as the FSD override is released. | The flame supervision device (FSD) isn't working correctly. | Refer to dealer | Professional Intervention Required |
N/A | Appliance will not light (LPG) | No gas | Check isolation valve is open | DIY Safe |
N/A | Floating flame | Lack of secondary air | Make sure every vent is clear (the vehicle's air inlet included); for an oven, also check the flue way isn't blocked. | DIY Safe |
N/A | Gas supply cut off due to an accident or collision | The Truma MonoControl's crash sensor has tripped after an impact producing 3g to 4g of deceleration directly on its triggering element. | Push the MonoControl's green button straight in and hold it for around 10 seconds - you may need a reasonable amount of force, using something like a pen or pencil to press it. | DIY Safe |
N/A | Odour (LPG) | Gas leak | Shut the gas off at the cylinder and don't use the gas system again until the fault's been fixed. Open every door and window to let any escaped gas disperse. If a cylinder itself appears to be leaking, contact the site warden and/or your local gas supplier. | Professional Intervention Required |
N/A | Orange flame (LPG) | Dust or dirt has got into the mixing tube and is passing through into the burner ports. | Reduce the level of dust in the surrounding air. | DIY Safe |
N/A | Yellow flame (LPG) | There isn't enough primary air reaching the burner - note that a little yellow tipping on the flame is normal and not a fault. | Refer to dealer | Professional Intervention Required |
Frequently Asked Questions
Q: How do I use the external BBQ point?
Fit the supplied adaptor onto your barbecue's outlet pipe, then push it into the vehicle's barbecue fitting and turn the red tap to 'on'. Once you're finished, turn the tap off again and detach the adaptor from the fitting.
Auto-SleepersHeating (Ford Transit Custom Air, 2023 Model Year)
Heating System (Space/Water)1010 FAQs
Heating (Ford Transit Custom Air, 2023 Model Year)
Heating System (Space/Water)Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Heater not operating/cuts | Unit fault | Refer to dealer | Professional Intervention Required |
N/A | The heater won't run on a 230V supply. | Over temperature trip activated | Leave to cool down | DIY Safe |
Auto-SleepersRefrigeration & Cooling (Ford Transit Custom Air, 2023 Model Year)
Fridge / Freezer0021 FAQ
Refrigeration & Cooling (Ford Transit Custom Air, 2023 Model Year)
Fridge / FreezerMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Fridge gas ignition not operating | Ignition control switch fault | Refer to dealer | Professional Intervention Required |
N/A | The fridge won't run on 12V while the engine is running. | Fault on fridge relay | Refer to dealer | Professional Intervention Required |
Frequently Asked Questions
Q: Does the refrigerator need a winter cover?
As part of laying the vehicle up for winter, fit winter covers to the fridge's ventilator grilles wherever they're needed.
Auto-SleepersWater System (Ford Transit Custom Air, 2023 Model Year)
Water System Component8111 FAQ
Water System (Ford Transit Custom Air, 2023 Model Year)
Water System ComponentMaster Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Continuous running of water pump | Pressure not set correctly | This handbook gives no steps for setting the pump's pressure. The pump is sealed and needs no servicing beyond a check at the annual habitation service, so have it checked by whoever does that service. | Professional Intervention Required |
N/A | Water pump does not operate | Fuse blown | Track down the fault and fit a replacement fuse of the identical rating. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Pump not working | Setting incorrect | The EC328 control panel controls the pump feed to both the internal supply and the external one. Make sure the pump switch's (tap button) position matches whichever supply you actually want. | DIY Safe |
N/A | Water gauge does not operate | Probe fault | Check the probe connections, and if that doesn't resolve it, consult your dealer. | DIY Check / Tech Fallback |
N/A | Intermittent operation of water pump | Minor leak in water system | Check push fit joints | DIY Safe |
N/A | Slow drainage from sink/shower tray | Blocked breathers in waste tank | Drop tank and clear breathers | DIY Safe |
N/A | The waste water level reaches 100% while the water pump's power switch is turned on. | Waste water tank is full (100%) | A warning beep will sound as the LCD screen starts flashing. Press select to dismiss it - it won't warn again until the water pump's power switch gets cycled off then back on. | DIY Safe |
N/A | Water level drops below 25% with water pump power switch turned ON | Fresh water tank level is low (less than 25%) | A warning beep will sound as the LCD screen starts flashing. Press select to dismiss it - it won't warn again until the water pump's power switch gets cycled off then back on. | DIY Safe |
N/A | Pump not working | Fuse blown | Replace with the correct-rated fuse. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Pump not working | Pump turned off | Press the pump button (tap symbol) on the EC328 control panel to switch it back on. | DIY Safe |
Frequently Asked Questions
Q: How do I winterise the water system before storing the vehicle for winter?
Open the drain valve next to the water heater, and leave the fresh and waste water tank drain taps open too. Open every internal tap, then run the pump until it stops delivering anything. Go for a short spin with those drain taps still open - it helps shift the last of the water out of the tanks and pipework. Pull the sink plugs so the system can breathe, give the waste tank a thorough flush to shift any debris, finish with a flush of mild disinfectant, and leave the drain tap open.