Auto-Sleepers Water System
(Ford Transit Custom Air, 2023 Model Year)
View official manual on manufacturer's site ↗Master 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 | Adjust as page 7-1 | 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 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.