Operation CHARM: Car repair manuals for everyone.

Air Inlet Valve

The air inlet valve is closed in most of the operating modes permitting outside (fresh) air to enter the A/C module. When selecting the Bi-Lev or RECIRC mode at a temperature setting of 18°C (65°F) or higher, the heater-A/C control energizes the recirc solenoid. This action causes the air inlet valve to open, allowing air from inside the vehicle to recirculate for maximum cooling.