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2004 gmc drivers side ac goes to heat stop motor and restart goes back to cool .some times for a few days and then sometimes a few min any body had this problem? thanks for any help!
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The most common cause of this problem is that the drivers seat heater grid is open or burned out. That is based on 25 years as a Ford dealer technician.
I will assume the ac is still getting cold, just not blowing. You wouldn't really know unless you pulled the panel and checked the lines. Causes include the blower motor, resistor, fuse, or switch.
There is a motor that controls the blend door for the driver's side, that may be faulty, or you may have a stuck or broked dr side blend door.You can access this part by removing the dr side underdash panel, and the dr side knee bolster.
you need the tempature blend door motor. My 01 silverado had this issue about 1 1/2 years before i was tired of messing with it they are not hard to replace. The cover (if it is still on) for passenger side floor ducts needs to be removed and the motor is near the right side of "hump" (trans tunnel) mounted horisontial with the armature pointing upwards.
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