| Poor or no cooling |
- Auxiliary drive belt fault
- Air conditioning compressor fault
- Distribution motor/flap fault
- Refrigerant leak
- In-vehicle temperature sensor fault
- Refrigerant pressure sensor fault
|
- Check the auxiliary drive belt condition and tension (see visual inspection)
- Check the compressor operation (observe the compressor as the engine is idling with the air conditioning switched on
- Carry out the distribution motor self test
- Using the manufacturer approved diagnostic system, check the Automatic Temperature Control Module (ATC) for related DTCs and refer to the relevant DTC index
- Check the refrigerant system using the charging station
|
| Noise |
- Auxiliary drive belt fault
- Air conditioning compressor fault
- Air conditioning compressor pulley fouling
- Refrigerant overcharged
|
- Confirm the air conditioning as the source of the noise by listening for the noise with the air conditioning switched off
- Check the refrigerant system using the charging station
|
| Water entry into cabin |
- Heater matrix leak
- Blocked evaporator drain tubes
|
- Check for coolant loss. Pressure test the cooling system as necessary
- Check and clear the evaporator drain tubes as necessary
|