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

Coolant Temperature Sensor/Switch (For Computer): Service and Repair

Coolant Temperature Sender:






REMOVE OR DISCONNECT:
1. Negative battery cables
2. Drain cooling system below level of sensor
3. Electrical connector
4. Coolant sensor

INSTALL OR CONNECT:
1. Coolant sensor
2. Electrical connector
3. Refill coolant system
^ Pressure test cooling system and check for leaks
4. Negative battery cables