AC stinks

[MAYukoner]

Just about to hit 2 years of owning.

Ac has always been great.

Used it today for about 30 minutes in as cold as it will go. I’d say it was semi cold in most but driver vents never got cold. Maybe cool then back to warm. Overall pathetic ac for it being only 75 out.

Going to dealer soon and don’t even know what could cause this. 15k miles only on a 21 Denali. Otherwise not really any issues w it in two years but this was pathetic.

 

[DuraYuk]

The vents on the outside of windshield (cowl) is where air is sucked in. Make sure no dead leaves and other gunk is in there. Hose it well. It has drains. And check your cabin air filter.

 

[MAYukoner]

I’ll take a look now. Thank you

 

[MAYukoner]

Not a leaf or twig in sight. Still meh

 

[OR VietVet]

Gauges on and pressure readings during a/c operation.

 

[DuraYuk]

Gauges on and pressure readings during a/c operation.

Why? Low or high refrigerant will not cause a smell. He has ac operation. Refrigerant leaks smell like chemicals.

Either something is gross in the cowl/dead/decomposing. Or the cabin air filter is dirty.

 

[DuraYuk]

Not a leaf or twig in sight. Still meh

Did you check the cabin air filter?

Id still dilute some car wash and hose off the cowl too. It can't hurt.

 

[Joseph Garcia]

How is the air flow coming out of the suspect vents? Do you get the same 'volume' of air coming out as with the heat function? The vent doors have been known to stick or lose their positional programming.

 

[OR VietVet]

Why? Low or high refrigerant will not cause a smell. He has ac operation. Refrigerant leaks smell like chemicals.

Either something is gross in the cowl/dead/decomposing. Or the cabin air filter is dirty.

He is not complaining of a smell, he is complaining of the a/c efficiency. Did you read the entire complaint? Or did you go by the thread title only? I see no where that the OP complains of a smell. You mentioned smell and if the refrigerant is leaking inside at the evaporator, you may smell something or if the leak is bad enough under the hood to come in the vents you may smell something but if it leaks that bad, ir would never actuate the a/c compressor clutch.

 

[MAYukoner]

Going in tmw

Just cleaned it again. Air flow is strong. Semi cold in back. Driver side warm Ari on coldest setting