A/C blower fan fluctuated back and forth from top vents to floor vents

Tiny
KAREN KLECKNER
  • MEMBER
  • 2001 CHEVROLET LUMINA
  • 3.6L
  • 6 CYL
  • AUTOMATIC
  • 174,000 MILES
Okay, I just had the fan and resister replaced, now the fan fluctuates on its own from top vents to floor vents. It also changes when I am driving uphill.
Saturday, September 21st, 2019 AT 9:00 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like you could have a problem with your vehicle's blend door actuator. These are little plastic motors that control the doors that make your vehicle's Heating, Ventilation, and Air Conditioning (HVAC) work properly. Here is a link below explaining about replacing them:

https://www.2carpros.com/articles/replace-blend-door-motor

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Saturday, September 21st, 2019 AT 9:53 AM

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