Having problems with your 1995 GMC Suburban ?

Front air blows cold, rear air blows warm

\015 Hey happy spring to all. It just reached 90 a couple of days ago and I went to use my air, and notta drop of soothing cool air was to be had. I put 4lbs of freon and oil in with seal conditioner, and YES! Ahhh.Cold air. But, my kids told me no cold air out the back vents. Well, as long as I'm cool, I mean, I'm the driver right! LOL Well sure enough, no cold air out of the back vents. What do I need to check or replace to cool the little devils in the back seats down? Those kids drive me nuts. A swift backhand should stop them from complaining, but sometimes I drive my Mother in-law and I really don't want to hear her ****. LOL\015 Posted / edited by AnonymousUser on : 27-09-2021

Answers :

I believe the rear A/C - HEATER unit is located under the right rear trim penel. Open the rear hatch and remove inside trim panel on your right side. There you will find an evaporator core and a heater core and a blower motor. Also an expansion valve / orfice tube. Have someone turn the HOT/COLD knob while you look at the motor that opens and closes the temp door located in the evap/heater box for the rear A/C-HEATER. This "motor" doesn't really look like a motor persay. It is about 1 1/2 inches thick and 3 or 4 inches square. If you look at the center of the motot there will be a white round piece of plastic that should be turning one way for heat and the other way for cold. If it's not turning check the plug with a test light to make sure you have power. These things are made of plastic and breake all the time. So if it is turning and you hear it "clicking" then the teeth are stripped or the gear is broken. The motors are not that expensive.(I guess because they breake alot). Hope this helps.
Have you checked to see if the heat\015\012control door is not closing?  it could\015\012also be  a bad expansion valve in the\015\012rear unit.

Repair Help & Product Troubleshooting for 1995 GMC Suburban

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