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No Air flow

Tiny
BUZZOFF
  • MEMBER
  • 2000 DODGE DURANGO
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
Blower sounds like it is running at all speeds, but I can barely feel it at any vent. What are my diagnostic choices?
Monday, February 19th, 2018 AT 5:31 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

There is a blower resistor that controls blower speed operation. It is mounted next to the blower motor. It is the most common failure for this issue.

Roy
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Tuesday, February 20th, 2018 AT 3:09 AM
Tiny
BUZZOFF
  • MEMBER
  • 2 POSTS
All speeds are running proper I said I just cant feel it at the vent so try again maybe?
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Tuesday, February 20th, 2018 AT 4:18 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,505 POSTS
It sounds like you lost vacuum tot he HVAC system. Can you check under the hood to see if you can find any small vacuum line headed to the firewall that are broken? Here is a guide to help you see what I am talking about:

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Tuesday, February 20th, 2018 AT 4:21 PM
Tiny
BUZZOFF
  • MEMBER
  • 2 POSTS
Thank you for the suggestion but, it is changing vent configuration properly just very little air flow. If I run it on high for very long it starts smelling like blower motor is getting hot, but only on high. Almost like there is some kind of obstruction. I have only had it for a week so I am still tracking all the bugs! :>(
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Wednesday, February 21st, 2018 AT 6:37 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If you smell the blower on high, I suggest you replace the blower motor and the resistor. They sound like they are overheating from too much current draw.

Roy
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Wednesday, February 21st, 2018 AT 6:58 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,505 POSTS
Here is a guide to help you test the power and ground of the blower motor circuit and it will show you what you are in for when doing the job:

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

Please let us know what happens.

Cheers, Ken
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Wednesday, February 21st, 2018 AT 10:00 AM

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