Rear AC not blowing cold air

bh5213 · Sep 19, 2017

Hi all.
I have a 2004 Suburban. The rear air has been making a squealing sound for a long time now in the back quarter panel, but still blew cold air. As of today, it stopped blowing cold air in the rear, only warm air. My front air still works fine, blowing cold air. I don't think it is the compressor since the front air works fine and not the back blower since it is actually blowing air, just hot. My thought is the actuator???? Any ideas. Thanks a bunch.

RayVoy · Sep 19, 2017

I think your right about the actuator.

Do you have front and rear controls?
Have you tried setting the temp from both locations?

bazar01 · Sep 19, 2017

Behind the rear passenger wheel are two refrigerant lines and two heater coolant hoses.
Set the rear thermostat to cold and go under behind the rear pass wheel and feel the bigger refrigerant line with your hand.
If one of the line is cold, then it should cool unless the heater blend door is not working and stuck in heating mode

bh5213 · Sep 19, 2017

is the heater blend door the same as the rear actuator or different component?

bazar01 · Sep 19, 2017

bh5213 · Sep 19, 2017

That is a very helpful video. I found another helpful video. So between these I should be able to fix this. Thanks everyone.

Rear AC not blowing cold air

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