high pitch sound when fan is on

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10-25-2013, 09:25 PM

jeepcherokee2014

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Model: Cherokee

high pitch sound when fan is on

Just got a new 2014 jgc v6 limited. When the a/c or fan is on I notice a very high pitched sound.. high pitched hum noise...almost makes me think I have tinitus. When I turn off the fan, it stops. It originates under the passenger area of the dash.what is it? Can it be fixed?

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10-25-2013, 09:34 PM

RTorrez1

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Year: 1998 Sport

Model: Cherokee

Engine: 4.0

Try posting in the grand Cherokee section. This is for the XJ's.

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10-25-2013, 10:45 PM

Radi

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Model: Cherokee

Noisy PWM controller for the blower?

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10-26-2013, 09:20 AM

salad

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Year: 1999

Model: Cherokee

Engine: 4.0L OBD-II

Quote:

Originally Posted by Radi

Noisy PWM controller for the blower?

Sounds like a good guess!

Like RTorrez said our Jeeps in this section just have massive resistors. The only whine I've heard like that on an XJ is my fuel pump. Your vehicle is about 4 generations removed from a Cherokee.

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10-26-2013, 09:37 AM

CCKen

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Year: 1999

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by salad

Sounds like a good guess!

Like RTorrez said our Jeeps in this section just have massive resistors. The only whine I've heard like that on an XJ is my fuel pump. Your vehicle is about 4 generations removed from a Cherokee.

I hear alot of whining on the Forum.

LOL