Question about 2004 Chevrolet TrailBlazer

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My A/C is just blowing warm to hot air. It is a 2004 Trailblazer and it is not freon system any suggestions

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Check to make sure the compressor is engaging, check the ac relay

Posted on Jul 16, 2009

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2 Answers

Heater not blowing hot air in cabin


Check the coolant level. Check for leaks. Next would be clogged heater core(doubt that 2004) next would be the water pump. Kind of doubt that also, 2004. But if you have leaks?

Dec 25, 2014 | 2004 Chevrolet TrailBlazer

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Air conditioning stopped working in my car


If the fan is blowing hot air, have you checked the system to see if it is full of freon ?

Jul 05, 2013 | 2005 Chevrolet TrailBlazer

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My toyota corollas (2004 LE) a/c blows out cold air for 10 min and then starts blowing out warm/hot air. Filled up freon but it did not work.


Sounds like your HAVC pressure switch is going out cutting off prematurely or the system is overcharged and shutting off to prevent damage.

Apr 03, 2012 | 2004 Toyota Corolla

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I have a 2004 Trailblazer and my rear a/c starts out blowing cold air but gets warm shortly after but the front a/c keeps blowing cold air all the time???? what could cause that ????


Just a little low on freon can make it get too cold and it freezs if you in position to check the freon level you'll find with the system on high and the engine reved up the low pressure is below 25PSI. fill it to reved up is above 25 and your problem will go away. Low on freon will make it cold enough to frezze up and then warm up as the air does'nt go though the ice. it'll work good as you start up till it frezzes and after it's stopped up with ice it blows warm (it's really too cold). the more freon in the system the warmer it'll all blow because all the pressures are higher and it's the difference in pressures that make it cold.

Aug 24, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Hello everyone I have a 2004 nissan titan and when I am travelling down the highway the ac blows warm I have checked the freon level and it has the proper amount of refrigerent in it and the clutch fan...


Hey Wb, You say you checked the pressure and its ok. Have you checked to see if the pressure is actually freon or just hot air..(this is from a personal experience with the same symptoms) Let some of the pressure off the system while it is running..(the low pressure valve) and if freon does not immediately come out.- Just hot air..let it bleed until freon comes out .. (mine was overcharged and I had to let out A LOT of air out of the system until freon started coming out).. try this and see if it helps.. ...mine is working fine..blowing cold air 24/7 after this .. with no other steps,,,

Jun 24, 2017 | 2004 Nissan Titan

1 Answer

Trail Blazer


One cause is that when filling the AC with freon, what happens is that people are not told to let the air out of the system and the can at the same time. So you fill your system to what you think it is full and it is really just full of air. The other is the relay is not opening fully. The other issue is the heater core is dirty and needs to be cleaned out with a jet of water

May 29, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

A/C blows hot air


This is best done by an ac repairman. Any air has to be removed from the system, and it's best to put the gas in with the proper gauges connected to the system. You don't want to blow a line by overfilling.

May 01, 2009 | 2003 Chevrolet TrailBlazer

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Dual climate control


There is a thing called a blend door, it controls air temp, that is where the problem is, most common issue is the motor that operates the door fails.

Jul 28, 2008 | 2004 Chevrolet TrailBlazer

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