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)

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Refrigerant Identification / Testing






Special Tools

1. Follow the instructions included with the Refrigerant Analyzer to obtain the sample for testing.

NOTE: Prior to recovering or charging the refrigerant system, you must use an A/C refrigerant analyzer to identify gas samples taken directly from the refrigeration system or storage containers.

2. The analyzer will display one of the following:
- R-12 or R-134a if the purity is better than 98% by weight.
- FAIL if neither of the two gases have been identified or if they are not at least 98% pure.
- HC and a horn will sound if the gas detected contains a hydrocarbon (flammable material).
3. If contaminated refrigerant is detected, DO NOT recover the refrigerant into your recovery/recycling equipment.