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Blower motor not working

Tiny
ROXYGRAY
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
My blower does not work on 1 and 2? What could this be?
Wednesday, July 14th, 2010 AT 3:29 PM

27 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Several things could cause this, start with testing blower motor relay. then check power from the switch panel. if both OK check wiring and if wiring is good as well then suspect faulty blower resistor pack.

This guide will show you how to check the problem and fix it

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only
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Wednesday, July 14th, 2010 AT 3:57 PM
Tiny
GLENN BOWERS
  • MEMBER
  • 4 POSTS
  • 2004 CHEVROLET TAHOE
2004 Chevy Tahoe V8 Four Wheel Drive Automatic

the a/c blower will not work on position 1-2-3-4 will work on 5 also cool air comes out the driver side but only hot air out the pass side. Cked all the fuses all ok
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Replace the blower motor resistor-also could be an air mix/blend/mode problems to include vacuum and actuators and the HVAC control module for the cold and hot air problem
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
GLENN BOWERS
  • MEMBER
  • 4 POSTS
Thanks, both these problems started at the same time are they interconnected? Also is the motor resistor changeable from under the hood. Thaks you very much.
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The BMR Its on the HVAC module see item no. 5 below


https://www.2carpros.com/forum/automotive_pictures/12900_bmr_2.jpg

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-1
Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
CHUCKY8841
  • MEMBER
  • 3 POSTS
  • 2003 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 162,000 MILES
Okay, so my ac/heater isn't blowing when I turn it on, but it does blow when I am driving. So how do I fix this?
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
Hello,

It sounds like you may have a blower motor that is going out, when the air is not blowing can you hear the blower motor working? Can you please shoot a quick video with your phone so we can see what's going on? that would be great. You can upload it here with your response.

Here is a guide to help walk you through the replacement with instructions in the diagrams below to show you on your car:

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Check out the diagrams (below). Please let us know what happens.
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
HEAVYHAMMER
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 10,200 MILES
My rear blower began making a squealing noise and then stopped working all together. I'm thinking the bushings in the motor gave out. Where is the rear blower located and how do I get to it?
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You have to remove the right rear quarter panel on the inside to get to the motor. If it squealed or squealing the bushing are probably freezing on the shaft and replacement is the option.
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Sunday, November 17th, 2019 AT 10:36 AM (Merged)
Tiny
HOCNGUYEN
  • MEMBER
  • 2 POSTS
Thank you for this post I had this problem and had to replace the blower motor cost me $84.00 all fixed I love this site.
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Sunday, November 17th, 2019 AT 10:37 AM
Tiny
JOSHUA NICKELL
  • MEMBER
  • 2 POSTS
  • 2002 CHEVROLET TAHOE
  • 160,000 MILES
Replaced the fan itself. What else would cause it to not come on?
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the fan relay or the computer
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What fan? Blower or?
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
JOSHUA NICKELL
  • MEMBER
  • 2 POSTS
It is the front AC/heater. You can feel cool when you drive fast but fan never turns on to blow. Replaced the fan but still had issue. Where is fan relay and is computer the one that controls the temp?
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Youll need to check the new motor by putting power to the motor from the battery to the positive side of the connecter the motor should turn on. Follow the power wire from the motor to the blower module. Its mounted in the a/c housing on the fire wall. Replace it.
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
MWESTL
  • MEMBER
  • 1 POST
  • 2005 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
The front blower went out today. The 40 amp fusz was fine and I get heat from the rear overhead vents.
Could this just be a relay and where exactly is it?
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
It could be a few things, the motor itself, blower motor resister, blower motor relay. The way to check is to start at the motor. IF the motor is getting power, then chances are the motor is bad. It is under the dash on the passanger side. If there is no power, then you work backwards to the resister, the relay, then the switch and further if needed.
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
DANNYK
  • MEMBER
  • 6 POSTS
  • 2004 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 52,000 MILES
Only the hi speed works on my front blower motor. Speed 1 to 4 are inoperatable. What is wrong
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
The problem is the resistor.

The resistor is on the HVAC module .


https://www.2carpros.com/forum/automotive_pictures/46384_12900_bmr_2_2.jpg

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Sunday, November 17th, 2019 AT 10:38 AM (Merged)
Tiny
PSU85
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 73,000 MILES
I walked out th is morning and the a/c blower was on full blast. Truck was locked on keys inthe house. When I opened truck I could not shut off blower si I pulled the fuse. What's up?
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Sunday, November 17th, 2019 AT 10:38 AM (Merged)

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