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

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Control Assembly: Service and Repair

Heater Control Mounting - Chevrolet:




Heater Control Mounting - Pontiac:






Remove or Disconnect

1. Negative battery cable.
2. I/P trim plate.
3. Heater and A/C control retaining screws and pull heater and A/C control away from the instrument panel.
4. Electrical and vacuum connections.
5. Temperature control cable from heater and A/C control.

Install or Connect

1. Temperature control cable to heater and A/C control.
2. Electrical and vacuum connections.
3. Heater and A/C control and retaining screws to instrument panel.
4. I/P trim plate.
5. Negative battery cable.