Operation CHARM: Car repair manuals for everyone.

Heating and Air Conditioning: Application and ID

HFC-134a A/C SYSTEM
Unlike the old conventional HFC-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.