A/C blower motor not working?

Tiny
CMCCRORY
  • MEMBER
  • 2012 GMC TERRAIN
  • 2.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 162,150 MILES
A/C and heater aren't working when I turn it on but as long as it is on and circulating from the outside and I'm driving I have a small amount of airflow. When I stop I have nothing. Before it started this I was experiencing a knocking like sound when I would turn it on, and the pressure of air coming out of the vents would fluctuate even when it was on high.
Thursday, October 6th, 2022 AT 8:34 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,702 POSTS
This sounds like the blower motor needs to be replaced. here is the location of the blower motor and a generic guide to help you test for power and check the ground. Check the images below.

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

Check out the images (below). Please let us know what happens.

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Thursday, October 6th, 2022 AT 12:05 PM

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