Question about 2002 Chevrolet TrailBlazer

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Have a 2002 Chevrolet Trailblazer that the air conditioning will blow cold on long trips but stops blowing cold air in stop/start traffic? A clicking sound is heard coming from under the dash when it decides to start blowing cold again. Any ideas as to problem?

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It sounds like you maybe low on freon and your a\c compressor is kicking in and out at lower RPM's because of low pressure,then you build enough pressure to keep it running at higher RPM's.

Posted on Sep 26, 2009

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Posted on Jan 02, 2017

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How to fix a/c and heater on 2002 chevy trailblazer?


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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.

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My a/c does not blow cold when idling


Condition

A/C stops cooling and blows warm air when the vehicle is idling for an extended period of time such as sitting in traffic.

Cause

Inadequate airflow over the condenser may cause this condition.

This problem is a known issue, See Bulletin No.: 01-01-39-004A
http://www.grandprixforums.net/website/Docs/TSB/99-01-39-004B_Air_Conditioning_Odor.pdf

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My air conditioning blows cold air when driving. However, when I am waiting in a car line the cold air stops and it blows air that is warm. What is the problem?


Does your temp gauge go up at the same time?
Check your radiator fan and make sure it comes on when the temp comes up.(sitting in traffic)

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I have a 2002 Volvo S60 air conditioning problem. Initially, the air conditioner will blow cool/cold air, but when I get in traffic and have to do a lot of stopping and starting the air turns warm. Have...


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You may want to have your fan clutch checked. If the fan on your water pump does not spin very hard when the vehicle is idleing than it doesn't draw air through the condenser and that air keeps the condenser cooler plus it keeps the pressure down on the high side of the ac system. leave comment.

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