Question 1

Water pump will not run

Accepted Answer

Make sure the plug and socket contacts are clean and seated properly, and check the wiring connections.

Question 2

The water pump switches on and off even with the tap shut

Accepted Answer

Look for air or water leaks at the taps and pipework, and readjust the pressure switch.

Question 3

The pump motor keeps running continuously and won't stop

Accepted Answer

Possible cause: The battery voltage may have dropped too low (10.5V or below), or the container's empty.. Confirm there's water in the container, adjust the pressure switch and/or recharge the battery, and check every pipework connection.

Question 4

The pump won't stop running, even with every tap shut

Accepted Answer

Possible cause: The voltage may now be well below what it was last set to, or the water container could be empty. Re-adjust switch or refill container.

Question 5

The pump won't run at all, even though the fuse is intact and connections are sound

Accepted Answer

Possible cause: Excessive continuous running. Replace pump and readjust switch.

Question 6

The pump cycles on and off repeatedly (a pulsing flow at the tap, or the water temperature won't hold steady)

Accepted Answer

Possible cause: The current voltage has risen well above what it was when the switch was last set.. Readjust the pressure switch, and if that doesn't clear it, fit a Whale Surge Damper.

Question 7

The pump is very noisy but isn't actually pumping any water

Accepted Answer

Possible cause: Air's trapped in the pump, fighting to escape as water tries to get in.. Unplug it from the socket so the pump floods, then reconnect by plugging it back in. When refilling the container, always unplug first, place the pump in, then reconnect - in that order.

Question 8

Solid waste matter building up and blocking the waste tank outlet tap

Accepted Answer

Possible cause: Collection of foreign matter and solid waste inside the waste water tank. Take the tank down for cleaning - there's a wide access fitting on its top - then turn it upside down to flush it through and clear out any solid debris.

Question 9

Water pump not operating

Accepted Answer

Possible cause: Switch on panel ‘off’. Switch it ‘on’

Question 10

Water pump not operating

Accepted Answer

Possible cause: Fuse blown. Track down the fault and fit a replacement fuse of the same rating.

Question 11

Continuous running of water pump

Accepted Answer

Possible cause: No water. Fill tank

Question 12

Continuous running of water pump

Accepted Answer

Possible cause: Major leak. Turn the system off straight away and check it over.

Question 13

Continuous running of water pump

Accepted Answer

Possible cause: Pressure not set correctly. Adjust as section 7-3

Question 14

Intermittent operation of water pump

Accepted Answer

Possible cause: Minor leak in water system. Check push fit joints

Question 15

Water pump does not operate

Accepted Answer

Possible cause: Fuse blown. Track down the fault and fit a replacement fuse of the identical rating.

Question 16

Water gauge does not operate

Accepted Answer

Possible cause: Probe fault. Check the probe connections, and if that doesn't resolve it, consult your dealer.

Question 17

Slow drainage from sink/shower tray

Accepted Answer

Possible cause: Blocked breathers in waste tank. Drop tank and clear breathers

Auto-Sleepers Water System

Also Fitted To This Caravan

Master Troubleshooting & Diagnostics Matrix

Frequently Asked Questions

Q: How do I winterise the water system before storing the vehicle for winter?

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Water pump will not run	—	Make sure the plug and socket contacts are clean and seated properly, and check the wiring connections.	DIY Safe
`N/A`	The water pump switches on and off even with the tap shut	—	Look for air or water leaks at the taps and pipework, and readjust the pressure switch.	DIY Safe
`N/A`	The pump motor keeps running continuously and won't stop	The battery voltage may have dropped too low (10.5V or below), or the container's empty.	Confirm there's water in the container, adjust the pressure switch and/or recharge the battery, and check every pipework connection.	DIY Safe
`N/A`	The pump won't stop running, even with every tap shut	The voltage may now be well below what it was last set to, or the water container could be empty	Re-adjust switch or refill container.	DIY Safe
`N/A`	The pump won't run at all, even though the fuse is intact and connections are sound	Excessive continuous running	Replace pump and readjust switch.	DIY Safe
Recommended partAffiliate linksView partHide Auto-Sleepers fits a Whale submersible pump in this water system but doesn't name the exact model, so this is the standard current Whale replacement rather than a documented exact match - check the pump fitted in your tank before ordering. Whale GP1002 Standard 12V Submersible Water Pump, 10 Litres~£19.914.6★ (1,000+ ratings), Whale-branded, sold by Serenity Garden Ltd, dispatched by Amazon View on Amazon →
`N/A`	The pump cycles on and off repeatedly (a pulsing flow at the tap, or the water temperature won't hold steady)	The current voltage has risen well above what it was when the switch was last set.	Readjust the pressure switch, and if that doesn't clear it, fit a Whale Surge Damper.	DIY Safe
`N/A`	The pump is very noisy but isn't actually pumping any water	Air's trapped in the pump, fighting to escape as water tries to get in.	Unplug it from the socket so the pump floods, then reconnect by plugging it back in. When refilling the container, always unplug first, place the pump in, then reconnect - in that order.	DIY Safe
`N/A`	Solid waste matter building up and blocking the waste tank outlet tap	Collection of foreign matter and solid waste inside the waste water tank	Take the tank down for cleaning - there's a wide access fitting on its top - then turn it upside down to flush it through and clear out any solid debris.	DIY Safe
`N/A`	Water pump not operating	Switch on panel ‘off’	Switch it ‘on’	DIY Safe
`N/A`	Water pump not operating	Fuse blown	Track down the fault and fit a replacement fuse of the same rating.	DIY Safe
Recommended partsAffiliate linksView 2 optionsHide Check 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`	Continuous running of water pump	No water	Fill tank	DIY Safe
`N/A`	Continuous running of water pump	Major leak	Turn the system off straight away and check it over.	DIY Safe
`N/A`	Continuous running of water pump	Pressure not set correctly	Adjust as section 7-3	DIY Safe
`N/A`	Intermittent operation of water pump	Minor leak in water system	Check push fit joints	DIY Safe
`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 optionsHide Check 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`	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`	Slow drainage from sink/shower tray	Blocked breathers in waste tank	Drop tank and clear breathers	DIY Safe