Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Heating and Air Conditioning: Application and ID



A/C Refrigerant System, Identification

Starting with 1993 m.y. (USA and Canada), A/C systems are charged with refrigerant R-134a.

Labels specifying refrigerant type are located on the compressor or radiator support. Before proceeding with refrigerant system servicing or repairs, confirm refrigerant type used.

Certain equipment, specifications and procedures vary from R-12 to R-134a systems. Always refer to the appropriate refrigerant system section in this manual when servicing A/C systems.