Truma RV air conditioner fault codes

RV roof air conditioners and their thermostats show codes for communication faults, sensor failures, or freeze protection.

How to read the code

Codes usually appear on the wall thermostat. Note whether the code clears when you cycle power, which often points to a communication issue.

All documented codes

Red LED (steady) warning
A permanently illuminated red LED (LED 3) on the IR receiver indicates a general fault wit… W17A warning
230V mains power was interrupted and the compressor switched off as a result. On the air c…

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