Operation CHARM: Car repair manuals for everyone.

Heating and Defrosting

Blower Motor
The A/C blower motor pulls air from the air inlet and forces it into the plenum assembly where it is mixed and distributed. The A/C blower motor has four speeds and is controlled by the blower motor switch and resistor (manual systems) or the EATC module and blower motor speed control (EATC systems).