1999 Chevy Silverado 1500 heater/ac problem.....?

MistyCreek

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I ran the a/c for years, didn't have a problem, regularly checked everything, the pump, belts, electrical work just fine....

The first time i ran the heater was back in September 2009 is when the problem occured.... Now my truck blows heat no matter where i turn the knobs to the hot/cold sides it always blows HOT air.....

i know the everything on the a/c works fine, I checked it. the pump works and the pipes are cold....


any suggestions on how to fix this?? It is coming onto summertime and would like my super cold a/c back....
 
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