Function Control

When MAX A/C is selected, air inlet door vacuum control motor is at full vacuum, closing off outside air and admitting only recirculated air. Panel door and floor/defrost door vacuum control motors are at full vacuum, directing airflow to instrument panel A/C registers. Blended air temperature is available. A/C compressor will operate if outside temperature is above approximately 43°F (6°C). Blower motor is on.

When NORM A/C is selected, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel door and floor/defrost door vacuum control motors are at full vacuum, directing airflow to instrument panel A/C registers. Blended air temperature is available. A/C compressor will operate if outside air temperature is above approximately 43°F (6°C). Blower motor is on.

When VENT is selected, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel door and floor/defrost door vacuum control motors are at full vacuum, directing airflow to instrument panel A/C registers. Temperature can be adjusted to heat air, but air cannot be cooled below outside temperature. A/C compressor will not operate. Blower motor is on.

When OFF is selected, air inlet door vacuum control motor is at full vacuum, closing off outside air from entering passenger compartment. Floor/defrost door vacuum control motor is at full vacuum and panel door vacuum control motor is at no vacuum, closing off airflow to defrost duct, side window demisters, floor duct and instrument panel A/C registers. A/C compressor will not operate. Blower motor is off.

When FLOOR is selected, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Floor/defrost door vacuum control motor is at full vacuum and panel door vacuum control motor is at no vacuum, directing airflow to floor duct. Temperature can be adjusted to heat air, but air cannot be cooled below outside temperature. A/C compressor will not operate. Blower motor is on.

When MIX is selected, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Floor/defrost door vacuum control motor is at partial vacuum and panel door vacuum control motor is at no vacuum, directing airflow to floor duct, defroster duct and side window demisters. Temperature can be adjusted to heat or cool air below outside temperature. A/C compressor will operate if outside air temperature is above approximately 43°F (6°C). Blower motor is on.

When DEFROST is selected, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Floor/defrost door vacuum control motor and panel door vacuum control motors are at no vacuum, directing airflow to defroster duct and side window demisters. Temperature can be adjusted to heat or cool air below outside temperature. A/C compressor will operate if outside air temperature is above approximately 43°F (6°C). Blower motor is on.