Auto Climate Control Problems

By 02ac
May 18, 2011 in Ask A GM Technician

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02ac

Posted May 18, 2011

I have a 2002 yukon xl 2500 with automatic climate control. The ac will not kick on unless it is cool outside (40's-50's). Anything over that and the ac light flashes. It will also come on whenever it wants to, even in manual mode, but only at cooler temps. The heat controls work fine and the ac is fully charged. I have also swapped out controls from another yukon with no luck.

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