Blower motor not working no air coming out the vents

Tiny
MATRIX2868
  • MEMBER
  • 2005 DODGE DURANGO
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
Duel Air system. The air in the back of the truck works fine but there is no air coming out the vents in the front of the truck. When its standing still and I cannot hear the blower motor. I do feel a little cool air from the front vents when the truck is actually down the road 'but still can not hear the blower motor 'when the truck stops so do the front air. But its running and cool in the back of the truck.
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Wednesday, September 11th, 2019 AT 9:05 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

It sounds like either there is no power to the front blower motor or the motor itself failed. Does it run if you put it on high speed?

Lets start with the basics. I need you to check two fuses in the under hood fuse box. See the attached wiring schematic for fuse numbers.

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Check there first and let me know what you find. Also, let me know if it runs on any speed.

Joe
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Thursday, September 12th, 2019 AT 7:37 PM
Tiny
MATRIX2868
  • MEMBER
  • 2005 DODGE DURANGO
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
I do apologize for the typos in the question I asked. This is a redo of the same question.

The vehicle listed above has duel air system. The problem is the air in the front not working properly. The back of the truck works fine. But there is no air coming out the vents in the front of the truck when its standing still. There is no sound from the blower Motor. There is a little cool air from the front vents when the truck is actually moving down the road 'but still can not hear the blower motor. But as soon as the truck stops' so do the front air. But its running fine in the back of the truck.
Any ideas what this could be?
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Friday, September 13th, 2019 AT 4:20 PM (Merged)
Tiny
KASEKENNY1
  • EXPERT
Hi,

Sounds like the blower motor is not running at all. The small amount of air coming out is most likely because the system allows air in and is sped up by the blower fan so that is just the natural amount of air coming into the system.

We need to measure power at the blower motor to find out if we have an issue with the motor or the power getting to it. If there is power there then the motor has failed. If no power then it could be a module issue or maybe a relay issue which is part of the Power Distribution Center (PDC).

Here is a guide that shows how to test wiring. Unfortunately, we need to do some testing because we don't want to just replace parts because of the number of different things that it could be.

Here is a guide that talks about how to test wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find at the blower motor and we can go from there.
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Friday, September 13th, 2019 AT 4:20 PM (Merged)

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