Question about 2003 Chevrolet TrailBlazer

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My A/C blower won't turn off and sometimes it won't blow at all.

I have a 2003 Chevy Trailblazer, my A/C blower won't turn off when I turn off the the car and because of that it wears down the battery all the time. I have been told that it could be the relay or other things. First of all where is the relay and how can I figure out what is wrong with out having to go to a dealership?

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Relay is under the hood in the fuse box it will be marked

Posted on Oct 01, 2009

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Posted on Jan 02, 2017

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I have a 95 Buick Roadmaster D blower motor will not shut off even if the key is out


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1 Answer

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Nov 14, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

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1 Answer

2004 Chevy Trailblazer, At first you could only get the air conditioning to switch on by turnning the vehicle off and switching over to AC. Now the AC will not come on and it is always blowing hot air out...


Could be your main blower motor resistor, mine would still run the fan even after shutting off the vehicle.(safari van) Had to unplug the resistor to stop the fan,it was near the blower under the hood. Bought a new one for about $45 bucks. Replaced it and all is fine. Might want to check relays first, sometimes they stick and need replacing.
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2003 Chevy Trailblazer AC won't turn off


Check on and off switch it may be defective.

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2003 Chevy Trailblazer my AC blower won't turn off!


you have a short to power which will cause it to stay on constantly check your blower motor resistor pack to ensure that it is working and check the wires going to the blower to make sure you have a power and a ground

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1 Answer

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1 Answer

Blower control module


There should be a relay for that blower. sounds like the relay is stuck. see if you can find out where it is and replace it. You should find that info in a service manual for that vehicle. hope this helps: )

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