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Old 10-24-2012, 08:26 PM
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Blower motor making a whistling nose on heat only

Hi guys need some help. I have an 07 GC limited with dual climate when I have it on hot air I get a whistling sound but when it's on A/C it sounds normal any one else have this problem or had it and know what the issue is. Please help thanks.
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Old 12-16-2013, 02:40 PM
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Re: Blower motor making a whistling nose on heat only

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Originally Posted by Tomc587 View Post
Hi guys need some help. I have an 07 GC limited with dual climate when I have it on hot air I get a whistling sound but when it's on A/C it sounds normal any one else have this problem or had it and know what the issue is. Please help thanks.

Has anyone else had this issue or come up with a fix? I have an 08 GC Limited with dual climate control. No noise at all when using A/C. When using heat, can turn the fan up to about 30% then a whistling sound starts and gets louder as the fan is turned up. I am about to tear everything apart guessing that it is one of the actuator doors not closing all the way and letting air pass by it (vibrating like a reed in a musical instrument). My dealer has replaced the blower motor under warrenty twice, but it is still making the noise.

I was just going to leave it until I can order a new Trailhawk, but the thing is driving me nuts!!
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Old 12-18-2013, 01:54 AM
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Re: Blower motor making a whistling nose on heat only

Courtesy of wkjeeps.com, TSB for HVAC, Whistle/humming sound from HVAC With Blower On, http://wkjeeps.com/tsb/tsb_wk_2400308.pdf.
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Old 12-18-2013, 09:31 AM
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Re: Blower motor making a whistling nose on heat only

Thanks Galaxie500! I'll try the fix this weekend and post if it works or not. Can't believe the dealer hasn't been able to figure it out, especially with a TSB issued.
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Old 12-23-2013, 10:55 AM
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Re: Blower motor making a whistling nose on heat only

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Originally Posted by Galaxie500 View Post
Courtesy of wkjeeps.com, TSB for HVAC, Whistle/humming sound from HVAC With Blower On, http://wkjeeps.com/tsb/tsb_wk_2400308.pdf.
Thanks again Galaxie500! I spent about an hour working on it this weekend, and sure enough, it was the foam seal going around the heater core - see attached pictures. Pushed the seal back in place and covered everything in metallic tape - no more noise even with the heat on full blast.

It is a good thing that Jeep paid for 2 new blower motors under warrenty while the fix was this simple! No more going to that dealer for any more repair work.
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