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GMC Forum: '05 GMC Sierra 1500 A/C blowing hot air?
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Old 08-28-2010, 06:01 PM
Blaine Blaine is offline
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Join Date: Aug 2010
Posts: 1
Default '05 GMC Sierra 1500 A/C blowing hot air?

I'm having A/C problems. A few weeks ago while driving on about a 100 degree day it was blowing cold air fine and then all of a sudden it starts blasting hot air like the heater had been switched on. Now the majority of the time when I crank it up the A/C is blowing hot. At first I would just kill the engine and crank it back up and it would start blowing cold occasionally, but for the past few days that doesn't seem to work. I had this same problem a few times last summer but once the temperatures started cooling a bit I didn't have any more trouble with it. From what I've read online it sounds like it may be a problem with the A/C cycling switch. I just wanted to see if this may be a quick and easy fix or if I should bring it in for an expert to take a look at it.

Any advice would be appreciated. Thanks.
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