Explorer AWD V6-4.0L VIN K Flex Fuel (2003)
Vacuum Sensor / Switch HVAC: Description and Operation
HEATER CONTROL VALVE VACUUM SWITCH
The heater control valve vacuum switch to control operation of the heater control valve. The heater control valve vacuum switch:
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is mounted on the RH side of the heater core and evaporator core housing just below the defrost door vacuum control motor.
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is actuated by an arm attached to the temperature blend door RH pivot shaft.
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applies vacuum to the heater control valve when the temperature blend door is in the full COOL position.
