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

Insufficient Cooling




Insufficient Cooling

1. Low pressure: normal
High pressure: high
System is too full. Drain and refill system.

2. Low pressure: too low
High pressure: too low
Insufficient refrigerant in system. Look for leakage. Refill system.

3. Low pressure: too high
High pressure: normal
Expansion valve is defective.