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It needs some freon, just like a refrigerator does when it stops getting cold. Take it to a auto garage and they will do it for you.

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Q: When the AC is turned on hot air is coming out What do you do?
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The air on your 1990 GMC Suburban wont switch fully from ac to defrost still have air coming out of the ac ventswhat do you do also you have hot air coming out of ac vents with ac on and set to cool?

is it because of a lack of vacuum pressure?


Why is hot air coming from th ac unit in your car I have added 134a freon?

Check your thermostat


Why is the Ac on but no cool air comes out?

If the ac is on and no cool air is coming out you may not want to turn the ac on at all. When you put the ac on, verify that the compresor is actually coming on, if you can see it spiining whne turned on, you may have low refrgernet in the sytem or a blockage. It is best to have it look at. If it is run when it is not working properly, you can severly damage the ac sytem if its being run when somthing is wrong.


There is no hot or cold air coming out of the AC just a loud buzz any suggestions?

Bad fan or something jammed into it?


Why is hot air coming out of the driver's side and cold on the passenger's side?

It is possible for hot air to be coming out of the driver's side and cold on the passenger's side if there is a dual temperature control on the heater/AC unit. Try adjusting the temperature controls to see if that fixes the problem.


Why is hot air coming out of your vents going down the road with your fan turned off?

The heat and AC system of your car has its outside air intake located in an aerodynamically high pressure area to naturally create air flow. This is intentional to create a natural air change inside the car. If the system is set on heat (or is broken) it will blow warm.


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You can, but it will only waste power trying to heat all the hot air that's coming in through the window.


Your 1993 Toyota Camry keeps overheating when the AC is on what's wrong?

Is the secondary radiator fan coming on when the AC is turned on?


I was driving to work going about 80mph and I turned on my ac I noticed smoke coming from my air vents. I freaked out and turned the ac off ewhen I went back to check it was not doing it anymore?

It was just condensation in the air coming out of the ac system and into the car. Nothing more than a bit of misty moisture that you could actually see coming out of the vents. It was not smoke unless you actually smelled something burning. Crank her up to 90 next time while you're at it... It was just condensation in the air coming out of the ac system and into the car. Nothing more than a bit of misty moisture that you could actually see coming out of the vents. It was not smoke unless you actually smelled something burning. Crank her up to 90 next time while you're at it...


What if your car ac blowing hot air after you changed the battery why?

your car ac will only blow hot air when there coolannt in the car is finished or the car is oveerheated.


Why is there water coming from the air vent in the house when the ac is on?

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You have your ac on 60 and it blowing hao air out why?

Your engine is hot.