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Doesn't blow at all when turned to high

Tiny
TBUTTRAM
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 190,000 MILES
Air on my 99 jeep grand cherokee doesn't blow at all when turned to high. Its like you turn the air to off when I turn it on high. I can't hear any air blowing at all? Any suggestions

hot or cold the air just shuts off when turned to the high position. The hole thing goes completely quiet
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Saturday, November 5th, 2011 AT 6:40 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like you might have a faulty blower motor resistor.
The blower motor resistor is mounted on the blower motor housing, and it controls the speed of the fan.
A faulty resistor can allow only a certain speed to work, could be the low speed or the high speed.

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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Monday, January 24th, 2022 AT 12:25 PM

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