Podam Ci rozwiązanie serwisowe tego problemu:
" Check supply voltage to evaporator temperature sensor.
If a supply voltage clearly above or below 5 V can be measured on the wiring harness with the evaporator temperature sensor disconnected, check the lines to the sensor for damage. If lines are OK, the heating/air conditioning control unit must be replaced.If a supply voltage of approx. 5 V can be measured on the wiring harness with the evaporator temperature sensor disconnected, replace the evaporator temperature sensor.
The evaporator temperature sensor registers the evaporator temperature in the heating and air-conditioning unit.
In the event of a fault, a continuous substitute value of -2 °C is specified for the evaporator temperature.
This substitute value prevents activation of the A/C compressor and therefore cooling of the passenger compartment. "
Reasumując na 90% panel klimatyzacji do wymiany lub naprawy jak ktoś potrafi.