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Ac blowing mist

Ac blowing mist

Postby David3307 [OP] » Oct 09 2019, 5:32am

Hi everyone,

Need some help. 2012 silverado ac blows cold and strong when at idle or low speeds but Ac slows to almost nothing and starts to blow a mist at higher speeds. If i turn it off for a few minutes then turn on again it will blow normal for about 5 minutes then does it again. Any suggestions would be greatly appreciated.
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Re: Ac blowing mist

Postby Rambodog » Oct 09 2019, 7:23am

Welcome to the site.
Sounds like your low on freon and the evaporator coil is freezing up. Turning off A/C for a few minutes allows the coil to thaw, thus allowing airflow again till it freezes again and blocks airflow. The high speed blower setting is just pulling ice off the coil and it's melting in the vent airflow affording you a wonderful mist instead of cold air.
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Re: Ac blowing mist

Postby David3307 [OP] » Oct 09 2019, 7:39am

Thanks for the quick reply. Guess I gotta get myself a pair of manifold gauges. Wonder were the freon is leaking from? Hopefully a quick fix. Thanks!
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Re: Ac blowing mist

Postby roorancher » Oct 09 2019, 1:17pm

You can add dye to the system....it may make it easier to find the leak.
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Re: Ac blowing mist

Postby David3307 [OP] » Oct 10 2019, 12:02am

It was low on refrigerant. Had to add entire can. It did the trick. Going to see how long it last before i pick up some dye and get into it further. A.c. has been like this for over a year so I dont think its a big leak if there is one. I heard somewhere that all vehicles lose refrigerant very slowly naturally over the years. I have not added any since I purchased it new in 2012. I might be wrong about that though. Thanks for the suggestions.
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Re: Ac blowing mist

Postby plant.oneplant.one is online! » Oct 10 2019, 5:10pm

since youve identified a leak - just go ahead and dye it now so you can find out where.

how much/how fast its leaking is irrelevant to an AC system - the only acceptable amount is 0.


waiting will only end up costing you $ - you lose enough of that oil and you'll destroy the compressor but good.
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Re: Ac blowing mist

Postby NARDA1 » Oct 10 2019, 11:40pm

I had the same issue. Mine was a pinhole leak on the condenser that was located on the front drivers side.
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Re: Ac blowing mist

Postby David3307 [OP] » Oct 10 2019, 11:48pm

I'm going to evacuate the refrigerant , vacuum the system and see how fast its leaking. Will put dye in with one can of refrigerant to try and find the leak. Will post my findings later this week. Thanks again eveyone.
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