Thetford N3104 Refrigerator (as fitted to Auto-Sleepers motorhomes)
Official technical documentation and troubleshooting for the Thetford N3104 refrigerator, fitted to several Auto-Sleepers Mercedes and Peugeot AL-KO Coachbuilt ranges.
View official manual on manufacturer's site ↗Technical Specifications
Gross Volume105 litres (including freezer)
Freezer Capacity11 litres
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Operational Fault | Refrigerator control panel displays an error code Possible Cause: Internal fault - these specific error codes have no user-serviceable cause. | Contact your dealer or a Thetford Service Centre directly. | Professional Intervention Required |
3 | The refrigerator does not work on gas Possible Cause: Gas bottle empty, or a gas/shut-off valve closed. | Check if the gas bottle is not empty. Check if the valve of the gas bottle and all shut-off valves are open. Switch the refrigerator off and on again. Try to run the refrigerator on another power source. | DIY Safe |
6, 7 | The refrigerator does not work on 12V Possible Cause: Engine not running. | Make sure the engine is running. Try to run the refrigerator on another power source. | DIY Safe |
10 | The refrigerator does not work on 230V Possible Cause: No mains supply available. | Check if the mains is available. Try to run the refrigerator on another power source. | DIY Safe |
11 | The refrigerator does not work in AUTO mode Possible Cause: No power source connected. | Check if the power sources are connected. Try to run the refrigerator on another power source. | DIY Safe |
18 | All symbols on the control panel light up Possible Cause: Normal start-up behaviour - not a fault. | Wait a few seconds until the refrigerator starts normally. No action needed. | DIY Safe |