In my 1997 suburan the air condtioning is blowing cool air in the back but hot air in the front. I was advised to change switch unit. Did that no help. Why would it work in the back and not in the front? It is losing freon. Check for leaks found none. Put in 4 cans of leak detect and freon. Also electronic freon sniffer still found no leaks.
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Air is blowing out of the vents its just hot air.
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