Fabian explains the most common error codes on AutoTerm Air 2D / R2D heaters – from overheating to glow plugs. With step-by-step self-repair guides.
Fix AutoTerm error codes yourself
In this QuickFix, Fabian shows how to quickly and easily resolve the most common error codes on AutoTerm heaters (Air 2D / R2D) yourself – ideal for campers, truck drivers and boat owners.
Error codes covered
| Error | Cause | Solution |
|---|---|---|
| 1 & 2 | Overheating due to disrupted airflow | Check air routing and ducting |
| 4 | Defective control unit / temperature sensor | Remove and replace control unit |
| 5 | Loose connection at temperature sensor | Check plug connection |
| 6 | Non-responsive temperature sensor | Check / replace sensor |
| 7 | Corroded cables in control unit | Identify and remedy corrosion |
| 9 | Interrupted glow plug circuit | Check glow plug |
| 11 | Oxidised contacts & corrosion | Clean contacts |
What you learn in this video
- Understanding and interpreting error codes correctly
- Checking air routing and ducting
- Safely removing and replacing the control unit
- Checking temperature sensor and glow plug
- Identifying and remedying corrosion
- When a repair makes sense – and when replacement is necessary
Tools required
- Flat-head screwdriver
- Torx T20
Spare parts
Matching spare parts and accessories for AutoTerm heaters are available in the PUNDMANN Shop.
More QuickFix guides on the PUNDMANN YouTube channel.