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Vents stop producing air flow

Tiny
KARLMARK
  • MEMBER
  • 1998 CHEVROLET CAVALIER
I have a 1998 Chevy Cavalier, I turn on the AC and I get strong air coming out of the vents, then 1 minute later the vents stop producing air flow, I can feel coolness coming out, but now strong air flow.

thanks
Thursday, February 21st, 2008 AT 2:07 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Just to clarify, after a minute the blower motor slows down in speed.

This could be due to a bad blower motor resistor. The resistor controls the speed of the fan. A faulty resistor can have excessive internal resistance when it warms up and slows down the fan speed. It can also be a malfunctioning motor.
The blower motor is located under the passenger side dash. The resistor is mounted on the blower motor housing (see diagrams below).

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

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Friday, October 29th, 2021 AT 1:50 PM

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