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

Control Assembly: Description and Operation

GENERAL DESCRIPTION





The operation of the A/C system is controlled by the buttons, rotary switch, and levers on the HVAC control. The compressor clutch and recirc motor are connected electrically to the push buttons on the control head by a wiring harness. Air flow is provided by the four blower speeds.

- The temperature lever controls the temperature door through a cable from the HVAC control assembly to the HVAC module.
- The mode lever controls the various mode positions by a cable from the HVAC control to the HVAC module.
- Blower speeds are controlled in all modes by a five position rotary switch. The blower, compressor, and recirc motor are not operational when the blower switch is in the OFF position.