Question about 1999 Chevrolet Suburban

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WHERE IS THE EXPANSION VALVE

AC IS COOL IN FRONT BUT THE REAR IS HOT

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Don't worry...the heat you feel on the rear side of ac is absolutely normal. that is why you always see the rear-end of ac's sticking out of windows every where...it's to expel the heat outside and not in your house.

Posted on Jul 31, 2009

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I believe it is on the right hand side in the very back. You have to take off a panel and it is behind the panel. I have worked on several 2005, 2006 suburbans. It seems they always have an issue with back Air.

Posted on Jul 31, 2009

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1 Answer

Why does the air conditioning in my 2003 GMC Yukon blow cold in the front but HOT in the back like the heat is on. It blows good just hot air. I have read that it could be the heater valve not closing...Is...


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Is the system full of freon ?
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Front a/c blows cold air but back is blowing hot air


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Above solution is correct, had the same problem with mine and it was the expansion valve.

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My rear ac its turned on but the air is not cool . and in front is work normal i dont know whats is the problem ?


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1 Answer

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either the freon charge is about 1/3 low, or the expansion valve needs to be replaced. Freon is getting into the evaporator, but not in great enough volume to cool the air unless it is coming in cool to start with. check your ac charge, and if it is full, then have it emptied, change out the expansion valve, and recharge it

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