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

Refrigerant System Leak

If A/C system is not cooling properly, determine if refrigerant system is fully charged with R-134a. This is accomplished by performing a system Performance Test. If while performing this test A/C liquid line pressure is less than 345 kPa (50 psi) proceed to Refrigerant System Empty. If liquid line pressure is greater than 345 kPa (50 psi) proceed to Refrigerant System Low. If refrigerant system is empty or low a leak at a line fitting or component seal is likely. Check the fittings, lines and components for oily residue, this is an indication of a leak.