BMW E36 air conditioning not cooling
Why is the E36 air conditioning not cooling?
The most common cause is a refrigerant leak. The leak is often at the condenser (the core in the bumper) or at the service valve adapter and Schrader valve. A vacuum test alone does not always reveal a leak, but dye and UV light show it.
Why does the compressor not engage?
The compressor only gets power when the engine is running and A/C is switched on. Check the pressure switch: it is above the drier, and if the compressor starts when the wires are shorted, the switch is faulty. The switch can be replaced without releasing the refrigerant. Other causes are too large a gap in the magnetic clutch or a faulty coil.
Can R12 air conditioning be converted to R134a?
Yes: replace the service ports and the drier, and fill the system with oil and R134a. The fill quantity is important, because too small an amount does not engage the compressor correctly. Have the work done at an air conditioning service.
What causes a bad smell from the air conditioning?
The smell often comes from fungal growth on the evaporator or a clogged fresh air filter. Replace the filter and clean the evaporator with a cleaner made for the purpose.