Operation CHARM: Car repair manuals for everyone.

Vehicle Damage Warnings


R-134a refrigerant is a non toxic, non-flammable, clear colorless odorless liquefied gas.

R-134a refrigerant is not compatible with R-12 refrigerant. Even small amounts of R-12 in a R-134a system will cause lubricant contamination, compressor failure or improper A/C performance. Never add R-12 to a R-134a system.