C2 Heat Exchanger Sensor Fault

I had something similar happen in my C2. Check the sensor calibration first. Is the fan running constantly or not at all?

Thanks! Any specific procedure for sensor calibration? I'll check the fan operation. Where's the sensor located? I want to check the connector.

I didn't mess with the calibration. I checked the fan and took it to a workshop. They confirmed a faulty sensor was disabling the AC.

A workshop visit was unavoidable. The heat exchanger temperature sensor was faulty, which disabled the AC, like you said. Total cost was 980€ including parts and labor. Thanks again!