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Old 01-08-2014, 11:20 AM
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High pitched whistle sound from heating blower fan

I have a '11 Overland with ~54,000 miles. This morning when my heater fan was running on high I noticed a high pitched whistle noise that sounds like it is coming from the passenger side under the dash. When the fan runs at a lower speed the sound decreases and finally almost goes away. If I manually turn the fan up again the whistle comes back. Has anyone else experienced this and does anyone have any recommendations short of going to the dealer?

Thank you.
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Old 01-08-2014, 12:27 PM
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Re: High pitched whistle sound from heating blower fan

Service Bulletin 24-007-11 may may address this.

"SYMPTOM/CONDITION:
The customer may experience a whistle or rattle sound from the dash while the HVAC is operating in panel mode with the blower speed set to 2 or 3 bars. To correct this condition the service port was moved from the A/C suction and liquid line to the A/C suction line."

The repair procedure is to replace the A/C suction and liquid line.

Hope that helps.

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2011 Overland 4x4 Hemi
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Old 01-08-2014, 12:32 PM
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Re: High pitched whistle sound from heating blower fan

I had a similar noise just the other day; a high-pitched whistle when the blower was on high. After nearly pulling my hair out, I tried raising all 4 windows.

Turns out that my wife had accidentally lowered her front passenger window ever so slightly. Completely closing the window immediately solved the problem! The window couldn't have been lowered more than an eighth of an inch, and wasn't visually noticeable.

Hope this helps.
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Old 01-08-2014, 01:14 PM
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Re: High pitched whistle sound from heating blower fan

I appreciate the recommendations. Unfortunately, the windows were not the issue. I will contact my dealer for the service bulletin.

Thank you.
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Old 01-09-2014, 05:35 PM
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Re: High pitched whistle sound from heating blower fan

I have a '12 Overland with same noise, but that TSB doesn't cover the '12's

I may take it to dealer anyway.
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Old 01-09-2014, 07:33 PM
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Re: High pitched whistle sound from heating blower fan

I had the same issue w/my 2012 Summit. Turns out the Chrysler installed a bad batch of blower motors into many Grand Cherokees at the factory.

Many have had these blower motors fail or have a high pitched whine due to bad motor bearings. My dealer replaced my blower motor under warrantee...... said it was a common problem and that they regularly stock new blower motors in parts to do this repair!

Chrysler is aware of this issue and you shouldn't have any problem getting this done under warrantee.
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Old 01-10-2014, 08:51 AM
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Re: High pitched whistle sound from heating blower fan

I have an appointment scheduled for Jan 20th, the soonest it fit my schedule. Hopefully I will have luck with the service bulletin or them fixing a known problem. With 55,000 miles I am not too optimistic for a warranty repair. Oh well, such is life and the cost of ownership.
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Old 01-15-2014, 08:45 PM
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Re: High pitched whistle sound from heating blower fan

I spoke with my local jeep dealer about the service bulletin and they were going to charge $600 to have it done… good luck
I can hear a little noise but its not supper noticeable… not worth $600 to fix yet
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Old 01-16-2014, 09:19 AM
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Re: High pitched whistle sound from heating blower fan

Glad i checked into this... I have an '11 Limited WK2 and have experienced the same thing... even had it quite working on me last summer. pulled the fuse, threw it back in and since then had noticed the whining... will be mentioning this to the dealer when i take it in for an oil change.

69,xxx miles.
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