Function Control

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Mode selector knob can be placed in MAX A/C, A/C, PANEL, OFF, PANEL & FLOOR, FLOOR, FLR & DEF (floor and defrost) and DEF (defrost) positions. MAX A/C and A/C positions control A/C compressor operation. PANEL, PANEL & FLOOR, FLOOR, FLR & DEF (floor and defrost) and DEF (defrost) positions direct airflow to chosen outlets. Defrost position activates A/C compressor to dehumidify air directed at windshield. Mode selector knob position determines which mode doors are open, partially open or closed. Mode doors direct airflow to selected outlets. See VACUUM DIAGRAMS .

When function control is in MAX A/C position, air inlet door is at full vacuum, closing off outside air and admitting only recirculated air. Panel/defrost door vacuum control motor is at full vacuum and panel/floor door is at no vacuum, directing airflow to instrument panel A/C registers. A small amount of airflow from side window demisters will be present. 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 function control is in A/C position, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel/defrost door vacuum control motor is at full vacuum and panel/floor door vacuum control motor is at no vacuum, directing airflow to instrument panel A/C registers. A small amount of airflow from side window demisters will be present. 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 function control is in panel position, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel/defrost door vacuum control motor is at full vacuum and panel/floor door vacuum control motor is at no vacuum, directing airflow to instrument panel A/C registers. A small amount of airflow from side window demisters will be present. Temperature can be adjusted to heat air, but air cannot be cooled below outside air temperature. A/C compressor will not operate. Blower motor is on.

When function control is in OFF position, air inlet door is at full vacuum, closing off outside air and admitting only recirculated air. Panel/floor door vacuum control motor is at full vacuum and panel/floor 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 function control is in panel/floor position, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel/defrost door vacuum control motor is at full vacuum and panel/floor door vacuum control motor is at partial vacuum, directing airflow to floor duct and instrument panel A/C registers. A small amount of airflow from side window demisters will be present. 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 function control is in floor position, air inlet door vacuum control motor is at no vacuum, admitting only outside air into passenger compartment. Panel/floor door vacuum control motor is at full vacuum and panel/defrost door vacuum control motor is at no vacuum, directing airflow to floor duct. A small amount of airflow from side window demisters will be present. Temperature can be adjusted to heat air, but air cannot be cooled below outside air temperature. A/C compressor will not operate. Blower motor is on.

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

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