Mechanics

GMC SIERRA AIR CONDITIONER PROBLEM

1992 GMC Sierra • 300,000 miles

I have a problem with my car over heating. The fan seems to work sometimes and sometimes it doesn't. I know this sounds crazy but it cools down when I turn on the air conditioner which makes no sense.
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Developer7
November 2, 2012.




When you turn on the AC, by default it turns the cooling fan on to make sure that air is pulled through the radiator and the condenser. Since the fan does come on we know that it works. Check your over temperature sensor it is probably not reading the temperature increase and is not signaling the fan to start operating.
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2CarPros Mike
Nov 2, 2012.
Thank you

Developer7
Dec 23, 2012.

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