Mechanics

CHEVY CONTROLS

2002 Chevrolet S-10

Heater problem
2002 Chevy S-10 6 cyl Four Wheel Drive Automatic 94500 miles

I have had a problem with the controls that operate the heater and defrost. I have replaced the acuators that control the position such as defrost, vent, floor and so on. It will work for awhile then will go to default(which is vent only). What could be the problem?
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Bsires
September 21, 2008.



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