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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Test E: Temperature Control Is Inoperative

PINPOINT TEST E: TEMPERATURE CONTROL IS INOPERATIVE


E1:






E2-E5:






Normal Operation
Under normal operation, the temperature control switch actuates the temperature blend door through the temperature blend door actuator cable.

Possible Causes
- Temperature control switch
- Temperature blend door actuator cable
- Heater core
- Stuck or bound temperature blend door