The rear heater is working put the front air is blowing gout cold air ? It's not the thermostat
Jan 20, 2013 at 6:37 PM
2003 KIA SEDONA
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ok, assuming you are correct, it could be a clogged heater core, blend door motor not changing the door. have them checked
Roy
Roy
Jan 20, 2013 at 6:41 PM
Is the blend door under the dash? How do you check it ?
Jan 20, 2013 at 6:55 PM
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yes, it is an electric motor and due to low voltage, it is monitored from a scan tool which can force the door to move back and forth.
Roy
Roy
Jan 20, 2013 at 6:58 PM
I have been under dash and found door that operate vents but not the blend door . Can you tell me where it is ?
Jan 20, 2013 at 7:06 PM
TEMP. ACTUATOR POTENTIOMETER
INSPECTION (FRONT)
Temperature control actuator is installed in the heater unit case. The control switches and the vent duct switch will operate actuator to regulate the temperature and discharge air.
Verify that the temp actuator operates to the warm position when connecting 12 V to the terminal 1 and grounding terminal 3.
Verify that the temp actuator operates to the cool p0sition when connecting in the reverse.
INSPECTION (FRONT)
Temperature control actuator is installed in the heater unit case. The control switches and the vent duct switch will operate actuator to regulate the temperature and discharge air.
Verify that the temp actuator operates to the warm position when connecting 12 V to the terminal 1 and grounding terminal 3.
Verify that the temp actuator operates to the cool p0sition when connecting in the reverse.
Image (Click to enlarge)
Jan 20, 2013 at 7:15 PM