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

Interior Temperature Does Not Lower


1. Blown fuse or circuit breaker.
2. Defective magnetic clutch.
3. Defective compressor.
4. Defective pressure switch.
5. Defective expansion valve.
6. Defective EPR valve.
7. Insufficient refrigerant in system.
8. Defective A/C switch.
9. Defective temperature sensors.
10. Defective rheostat.
11. Defective servo motor.
12. Defective vacuum valves.
13. Defective A/C amplifier.
14. Defective magnetic clutch relay.
15. Defective wiring or ground connections.
16. Defective vacuum circuit.
17. Defective water valve.