Question about 2000 Chevrolet Tahoe

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My ac blowing hot air and my canister stay warm

It was working I had a bad clutch so I change the compressor the canister and orfice tube

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  • Chevrolet Master
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Should work if you put enough freon in it. Drawing a vacuum pulls moisture out, but if it is full of freon, it will be cold, Just not as cold as it could be. If you have rear air, it could take 4+, 12 ounce cans of freon.

Posted on Jul 24, 2015

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  • Chevrolet Master
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Did you then draw a vacuum and charge the system?

Posted on Jul 23, 2015

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1 Answer

2005 XG350 ac blows hot air not cold dealer installed new compresor, and belts blows 70 degree air at dash grills


A system will only drop temp about 20 degrees from outside temp. I would have then recheck the Freon level again. To much is as bad as to little when it come to Freon. Also the oil level can be to high causing the same thing. When they changed the compressor they should have also replaced the dryer and the orfice tube/screen. If that wasn't don't you could have a obstruction in line.

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Air cinditioning wont stay on, it switches to heat and wont shut off


What do you mean when you say it wont shut off? is it blowing hot air or do you just feel a lite flow of hot air even if you have the settings to cold?

If this is the problem that you always feel hot air at low flow and the ac goes to hot air then i would say one of two things, first if you have the selector to cold and you feel hot air then there may be a problem with the blend door, this door move to allow hot or cold air, the door may be broken or just a bad motor that controls it. keep in mind if the ac system shuts down for any reason the air then will be warm, it will be about the same temp as outside and maybe a little hotter.

this problem almost sounds like the ac compressor shuts off and then you are getting the outside air which is hot, there are many reasons for the compressor to shut off, it could be the compressor clutch heating up and disengaging , this would be due to a bad compressor clutch.

another reason is the fans are not working, the best thing to do is when the system starts to blow warm check and see if the compressor is running, start engine and look at the front of compressor, with ac off the front of it will not move, and then with ac on the front will spin, check it out and let me know, if it blows warm air and ac is not working then it may be compressor problem but if you are getting warm air and the compressor is spinning then it may be a door problem.

This is hard to check with out testing the system, so i listed a few things to check and let me know the out come. also the ac blows cold for how long before it gets hot air blowing out of the vents, good day.

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Hey I am haveing a problem with My 2500HD ac system. I have changed The Condensor, evaporator, and the Compressor. I have charged it to the correct levels. It blows cool air, but it doesn't get cold....


Did you change the Receiver/ Drier and the Orfice Tube/ Expansion Valve? The Receiver/ Drier takes moisture out of the system and the Orfice Tube/ Expansion Valve controls the Hot/ Cold air. If that is bad it may not be opening or closing fully which would not let your A/C get as cool as it supposed to.

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I would check the following possibilities:
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2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

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1 Answer

Air conditioning


when it gets warm , open the hood and watch the ac compressor , is the clutch still engaged and the front of ac compressor spinning , is the large tube out the back very cold , the other tube should be hot or warm.
if the air is warm but the ac is working correctly under hood then you have a issue with the vacuum controls on the inside of car.

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