‘14 Yukon with vapor coming from AC vents

[Ex Euro Driver]

Only happens at certain times, not consistently. It’s odorless and mainly comes from the center vents. Had the refrigerant topped off last year and checked system for leaks. Given the all clear. Any ideas?

 

[swathdiver]

Only happens at certain times, not consistently. It’s odorless and mainly comes from the center vents. Had the refrigerant topped off last year and checked system for leaks. Given the all clear. Any ideas?

I think that's just cause of the weather, must be hot and humid out and the ac is pumping out cool, dry air.

 

[Ex Euro Driver]

Thanks swath. It’s odd, my ‘13 Tahoe never did it. I’m going to get under the truck and look for the AC drain and make sure it’s not clogged. Thanks again.

 

[Tonyrodz]

I think that's just cause of the weather, must be hot and humid out and the ac is pumping out cool, dry air.

My exact thoughts. Has happened to mine a few times--when it worked.

 

[swathdiver]

Thanks swath. It’s odd, my ‘13 Tahoe never did it. I’m going to get under the truck and look for the AC drain and make sure it’s not clogged. Thanks again.

Anytime, I should add that the vent is also probably in the open position and not recirculate as well when it does this right? I've seen it a few times over the years.

 

[Ex Euro Driver]

That is correct. I rarely use the recirc just out of fear of the dreaded AC musty stink. I’ll post if I find anything more.

 

[Ex Euro Driver]

My exact thoughts. Has happened to mine a few times--when it worked.

Most likely the case. I live at 6000 feet elevation and it doesn’t do it up that high, only down in the valley at 400 feet.

 

[Ridin Solo]

This happens to me too however, for me, it tends to happen more frequently when I am low on Freon, shit it even spit a tiny icicle out of my passenger air vent a couple weeks ago when it was doing that and I finally just found a leak with my evap coil. I know you said that you don’t have a leak per the last check but if you had to top off your Freon, there probably is a leak, it just might be really small. Last summer couldnt find a leak so I had the Freon topped off and we are just now barely starting summer again, sure enough I was out of Freon again but this time found the issue. Maybe coincidence but for me, those issues seem to be correlated somehow.


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[BG1988]

Only happens at certain times, not consistently. It’s odorless and mainly comes from the center vents. Had the refrigerant topped off last year and checked system for leaks. Given the all clear. Any ideas?

that is just a weather cloud forming inside...

or Fog since it's on ground level
this video explains it very well

 

[petethepug]

The low on refrigerant scenario may be occurring. Our other two cars we had did this before they started to hiss from the evaporator starving for gas.

I’ve read that the factory began putting dye in the systems when built. If this is true (please come in to verify) it’d be worth it to buy the uv light and give the lines a look see at night.


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