Front AC cool not cold

[opiefavors]

Hi I have 2000 Yukon XL 2500. The rear ac will freeze you out even stopped in traffic. The front however isn't as cold. I will still sweat especially stopped in traffic. Rolling down the high way is better but still not as good as the rear. Whats going on? I'm confused on this one.

 

[chauncey0337]

Seem to get a lot of this topic in the summer. Sounds like a blend door actuator.

 

[opiefavors]

Just found the blend door fix thread. Thanks, I'll try that.

 

[uwasride]

An easier thing to check first is the condenser in front of the radiator. The cooling fins will get full of debris, bug guts, or in my case I found an animal was in the process of building a nest between the condenser and the radiator. When the condenser becomes obstructed it will not condense the refrigerant back to a liquid as efficiently, this in turn could also cause the cool, but not cold air, and is much easier to check than the blend door.

 

[matthones]

I just had this very issue. Ended up being a leaky seals. Shop replaced a few seals where the hoses and compressor meet then refilled, ice cold now. For some reason, and I searched tons of forums, when the freon level gets low the rear a/c stays colder for longer than the front. Good luck.

 

[opiefavors]

Thanks guys for the replies. Got a set of gauges thing is really screwy. Here's my readings:
Ambient air temp 80*. 67% humidity. 1500rpm. Low side 30 psi and high side 175psi.
I let it run for awhile while I sprayed the condenser out the best I could. This is the second time I sprayed it out. The first time it wasn't running and was a couple of days ago. After i sprayed it out the readings were 35psi on the low side and 115 on the high side. Dose that make any sense to you guys.

---------- Post added at 10:01 PM ---------- Previous post was at 09:56 PM ----------

Still haven't ruled out the blend door because my low pressure lines are cold but not that cold.
The temp seemed cooler today but that might be because I let off a little bit of pressure by hooking up the gauges. And the truck sat in the shade for an hour before I went to work.

 

[opiefavors]

Just wanted to give an update. I had the system vacuumed down and I put in all new oil and refrigerant. They said there was too much oil in the system Working a lot better. Still sucks sitting at idle. So when I get my other truck fixed I'm doing the 05+ efans.

It also started to over heat on me while idling today(went well over the 210 mark. The transmission temp gauge stayed at 200 no matter what I was doing and I dont like that one bit. So I'm guessing the clutch is going out on the fan.

 

[MRS.Z-56_Hoe]

Mine does this too

 

[a4edwin]

Not to thread jack but what should trans temp be at? Mines goes up to 200

 

[Warrior14]

I may be wrong but my bully dog normally says that my tranny sits around 180 on a hot day of highway driving.