A/C Occasionally Blows HOT Air!!

[Vortec_4300]

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Originally posted by Vortec_4300:

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Originally posted by punisher:

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Originally posted by tblazed:
Most GMs these days including the trucks have electric motor "actuators" that operate the ducts with position feedback to the computer. Not vacuum like in the olden days...

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Bingo.

Check with the dealer. There is a chance of a TSB or special service message that covers your problem. Wiring, a bad temperature selector switch or faulty blend door actuator/motor can cause intermittents like this.

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Punisher - you nailed it (see my earlier post, above.) It was the actuator.

 

[Vortec_4300]

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Originally posted by Whodey:
Just trying to see this from the dealers viewpoint, but when you took it in the first time and said,"my ac started blowing warm", why would they initially just look at the driver side actuator only if what you were describing sounded like the whole a/c system quit cooling?

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I see your point (and the dealers too.) I guess that it's just the hassle of my having to repeatedly take the truck back in until it was correctly analyzed and repaired (and, in that context, I'm keeping my fingers crossed that the fourth time is the trick, and it trully is fixed.)