Traveller AC Temperature Sensor Issue

The symptoms suggest a problem with the temperature sensor or the air conditioning control unit. It's unusual for the AC to completely fail due to a sensor, though. Did the diagnostics specifically mention the air conditioning control unit being defective, or just the temperature sensor?

The diagnostic report highlighted the defective temperature sensor in the heat exchanger as the primary fault. The air conditioning control unit was identified as a 'likely cause' based on the sensor's malfunction affecting its operation. Could a simple sensor malfunction truly disable the entire air conditioning system, or should I be looking at other potential issues within the HVAC system itself?

A defective temperature sensor can definitely cause the AC to shut down to protect the system from damage. If the diagnostics point to the sensor, replacing it is the first step. If the AC still doesn't work after that, then the control unit may need further investigation. However, given the stored error and symptoms, replacement seems like the appropriate next step, which should be done at a workshop.

Following your advice and further consultation, the defective temperature sensor was indeed the root cause. Replacing the sensor restored the AC and cleared all error messages. Your insights helped streamline diagnostics and avert unnecessary control unit repairs. The repair cost was precisely 980€ as estimated. Thanks again for your expertise!