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

Air Delivery

HVAC CONTROL MODULE




The HVAC control module is a non-class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and air distribution settings. The ignition 3 and battery positive voltage circuits provide power to the control module. The control modules supports the features as in the table.