04 - FAN WON'T SHUT OFF

2004 Chevrolet Trailblazer

Tiny

loridemann

July, 30, 2011 AT 4:38 AM

The AC/Heater fan won't shut off after vehicle is shut off, 2004 chevy trailblazer, any ideas on what is wrong? We had to disconnect the battery to get the fan to stop running.

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Heater Blower

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2 IMAGES

9 Answers

Tiny

rasmataz

July, 30, 2011 AT 10:57 AM

Check and test the blower motor relay

Tiny

loridemann

July, 30, 2011 AT 4:08 PM

Where is this located and how do you test it? Please advise, my husband is out looking at it right now and he's no mechanic, but has replaced a few minor things on the truck, is this something major or could a novice do it?

Tiny

cadieman

July, 30, 2011 AT 4:16 PM

The power module is in the under hood a/c case. This needs to be replaced

Tiny

loridemann

July, 30, 2011 AT 4:28 PM

Hi! You mean the power module needs to be replaced or the blower motor relay? (See previous post by rasmataz) Please advise and thank-you!

Tiny

cadieman

July, 30, 2011 AT 5:46 PM

If you disconnect the power module the fan will stop.U need a power module.I see them on line for 75 dollars.

Tiny

loridemann

July, 30, 2011 AT 7:35 PM

Hi! We just came from O'Reillys Auto parts and they said it is the Blower Motor Resistor in which we had replaced about 5 years ago and it is bad again, it seems. Can you tell me how to get info on replacing it? My husband will do it, watched the other mechanic do it the first time but can't remember how he got to the part to replace it? Ie. Through the dash, but is it the glove box area or driver's side. How do you get to the part?

Tiny

rasmataz

July, 30, 2011 AT 8:36 PM

Blower Motor Resistor Assembly Below right side of dash, near blower motor-sorry no picture

Tiny

loridemann

July, 30, 2011 AT 9:00 PM

Thanks guys, it's done and it works. Any ideas of why we go through these so often though? Replaced very same part less than 3 years ago and this part was heat damaged. You could smell the burnt smell on the actual old part after we removed it. Man, you guys are awesome!

Tiny

rasmataz

July, 30, 2011 AT 9:07 PM

You're welcome, Its probably due to an overload or just not made right

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