A/C not working on one side?

2002 CHEVROLET EXPRESS

110,000 MILES • V8 • 2WD • AUTOMATIC

RONNEMMERS

MEMBER
1 POST
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rear A/C vents blow air okay, cold. But, Front A/C vents only the right one blows cold. The middle ones and left ones blow warm. What might cause this? Fuses are fine, refrigerant is fine and has been recharged.

Jul 21, 2011 at 11:18 AM

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KASEKENNY

AUTOMOTIVE REPAIR CONTRIBUTOR
18,907 POSTS

We need to find out what the pressures are on the system because it appears the refrigerant is low. I understand it has been recharged but it may have a leak and is low again. So here is a guide that will help with this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Once we know what the pressures are we will know better what the issue could be. Here is a guide that will help with this in more general terms:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Also, here is an attachment that will show proper pressures based on ambient temperatures. Thanks

Image (Click to enlarge)

Dec 9, 2020 at 7:50 PM

CBEEEEE

MEMBER
1 POST

It's clearly a blend door actuator in the duct, nothing to do with refrigerant levels.

Sep 19, 2022 at 8:04 PM

MIKE H R

AUTOMOTIVE REPAIR CONTRIBUTOR
3,094 POSTS

Does the heater contol change from floor to defrost or anywhere or any other selector switch? What happens when you turn all the heat on and not the a/c. Check what ducts the heat comes out of and if there is a difference with the amount. Let it run for a minute then shut it off. Then try the a/c check each duct one at a time. You should be able to close one duct at a time. The duct may be stuck.

2carpros.com
Mike

Sep 21, 2022 at 4:19 PM