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

System Repair




PRECAUTIONS WHEN REPLACING OR REPAIRING PARTS







- When servicing components: cap or plug all open ports.

Technician tip: save the plugs and caps from new replacement parts for future use.

- Have all parts and tools laid out ahead of time.
- Do not remove plugs or caps from A/C components until just before installation.
- Never combine R-12 and R-134a.
- Use only those refrigerants that are approved for automotive use (R-12 and R-134a). Do not use R-22 or any other refrigerant.
- Use only refrigerant oil for lubrication when assembling seals and "O"-rings.
- Use a blast of compressed air or wipe fittings and connections clean before and after repair, to prevent dirt from entering the system