Operation CHARM: Car repair manuals for everyone.

HVAC System (Heater, Ventilator and A/C)

CAUTION

HFC-134a A/C SYSTEM
- Unlike the old conventional CFC-12 system components, the cooling system components for the HFC-134a system such as the refrigerant and compressor oil are incompatible.




- Vehicles with the HFC-134a system can be identified by the label (A) attached to the vehicle. Before maintenance, check which A/C system is installed in the vehicle.