Question about 1998 Chevrolet Suburban

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The front air isn't blowing out as hard and the back a/c blowing out but blows out hot air! what's is the number one reason for this problem?

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The number one reason for hot air out the back could be low freon or bad blend door to the rear, and not blowing hard out the front could be a block in the evaporator core. the core is like a small radiator that freon flows through and air is blown through it to make cold air sometimes if they leak it blocks the fins which slows down the air flow.

Posted on Jul 09, 2010

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1 Answer

The front air isn't blowing hard through the vents but some air is blowing through the defrost


The vents are not working properly. most run off of vaccum and that sounds like your problem. could also be the controls. suburbans are famous for this.

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Front a/c blows cold air but back is blowing hot air


Could be low on freon, a faulty expansion valve on the rear system, or other issues. Can you tell if the rear ac lines are hot and cold ?

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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.

May 25, 2012 | 2000 Dodge Grand Caravan

1 Answer

It blows out hot air even when the air in the front is cold


Hard to read your question, do you mean it blows cold air out of the front vents and hot air out of the rear passenger vents?

If the air coming out of the front is just cool and not cold, and the rear vents are warm, you have low freon and need to have it serviced.

Jun 03, 2011 | 2000 Pontiac Montana

1 Answer

The heat is not getting hot in the front but the back heat blows out hot heat. Whats the possible problem?


If you can get cold air blowing out the front vents, the front heater door is not working properly. If you don't get air blowing out, check the front heater fan and its resistor block.

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1 Answer

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1 Answer

I live in a very hot climate, Yuma AZ. In the


It may be getting low on freon sometimes they leak out

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