2004 Ford Expedition Heater problem, half and half

70,000 MILES • V8 • 2WD • AUTOMATIC
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JOHNKRODDY
  • MEMBER
  • 2 POSTS
My heater blows hot on the passenger side, cold on the drivers side. I need fix-it help.
Dec 11, 2008 at 2:23 AM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
blend door actuator
its on HVAC box


The plenum chamber directs airflow from the blower motor through the evaporator core and heater core. All airflow from the blower motor passes through the evaporator core. Airflow is then directed through or around the heater core by the temperature blend door(s). Vehicles equipped with DATC use a partitioned plenum chamber with two electric actuator-positioned temperature blend doors. This allows for separate temperatures to be selected for the driver and passenger sides of the passenger compartment. Manual systems use a single electric actuator-positioned temperature blend door to direct airflow through or around the heater core.
Dec 14, 2008 at 12:05 AM
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