high pitch sound when fan is on

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Oct 25, 2013 | 09:25 PM

jeepcherokee2014

Thread Starter

Newbie

Joined: Oct 2013

Posts: 1

Likes: 0

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?

Oct 25, 2013 | 09:34 PM

RTorrez1

CF Veteran

Joined: Sep 2011

Posts: 4,172

Likes: 4

From: Riviera, Texas

Year: 1998 Sport

Model: Cherokee

Engine: 4.0

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

Oct 25, 2013 | 10:45 PM

Radi

CF Veteran

Joined: Apr 2012

Posts: 5,302

Likes: 23

From: Wisconsin

Model: Cherokee

Noisy PWM controller for the blower?

Oct 26, 2013 | 09:20 AM

salad

Herp Derp Jerp

Joined: Nov 2011

Posts: 18,251

Likes: 17

From: Parham, ON

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.

Oct 26, 2013 | 09:37 AM

CCKen

CF Veteran

Joined: Aug 2010

Posts: 8,357

Likes: 103

From: Canton, MI

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