Rear AC blows 50F (cold), Front AC blows 70F

[mattluttrell]

Hi,
I am dealing with an issue with my 2002 Escalade.

The freon, compressor, accumulator and condensor are working properly.

Outside temperature: 95F
Rear AC: 50F
Front AC: 71F
(All temperatures take with infrared thermometer)

The front stays warm regardless of whether the rear is on or off.

This occurs with freon at several levels. (It was recently filled and serviced)

Front temperature actuator is working perfectly. To prove this, I actually removed it and moved the door manually. It is fine. (I can move the door and make it very hot up front or if I close it, it will make it luke warm)



The switch that changes from recirculate to external air appears to be working perfectly. I folded down glove box and felt it open and close.

The cabin filters were replaced 4 months ago. They should be clean.



What else can I check? Thank you.

 

[mattluttrell]

It turns out it was low on refrigerant. The shop filled it but obviously not enough. I shouldn't have assumed they did it correctly. It's possible I have a leak now too.

Yesterday I noticed my compressor was cycling often and I was getting 112F out of my vents. It was 100F outside. Due to the heat outside, I filled to the max. I immediately started getting 60F in the front vents. This morning I could get 49F.

I'm happy.

 

[mattluttrell]

Now I'm bragging...
I'm getting 43F air when it is 96F outside.