Fresh/RECIRCULATION Control Lever

The fresh/recirculation control lever mechanically operates a cable which opens or closes the fresh/recirculation mode door to fresh (outside) air. When lever is in recirculation position, outside air is shut off and air from inside passenger compartment is recirculated through the blower motor to selected air outlets. See Fig 1 and Fig 2 .

Fig 1: Identifying Heater Control Panel

Courtesy of GENERAL MOTORS CORP.

Fig 2: Exploded View Of Heater System (Typical)

Courtesy of GENERAL MOTORS CORP.