2002 Ford Explorer

Tiny
CHUBBOCAT
  • MEMBER
  • 2002 FORD EXPLORER
Heater problem
2002 Ford Explorer 6 cyl Four Wheel Drive Automatic

heater control knob for tempature will not activate air flow door
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Saturday, November 22nd, 2008 AT 4:16 PM

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Tiny
DAVE H
  • EXPERT
Manual Climate Control System
The manual climate control system operation is determined by the settings on the climate control assembly. The climate control assembly includes a serviceable function selector switch and blower motor switch. The temperature control switch, A/C request switch and rear window defrost switch are integral to the climate control assembly and are serviced as an assembly. For additional information, refer to CONTROL COMPONENTS and GLASS, FRAMES AND MECHANISMS.
The blower motor switch:
Sets the front blower motor speed.
Directs the blower motor path to ground through the blower motor resistor to allow blower motor operation in LO, MED LO and MED HI.
Actuates the high speed blower motor relay, giving the blower motor a direct path to ground which allows the blower motor to operate in HI.
The temperature control switch:
Is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
(If equipped with a heater control valve vacuum switch) initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
Is serviced only with the climate control assembly.
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Saturday, November 22nd, 2008 AT 7:40 PM

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