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-   -   Whistle sounds when AC or Heat is on (

dink74 11-20-2008 05:15 AM

Whistle sounds when AC or Heat is on
I have noticed a whistle and it seems to be getting worse. Anyone else have this issue. I am going to contact the dealer as it is annoying to say the least. it seems to be worse when I have the system on the feet setting.


jetfuel 11-20-2008 05:51 AM

..sounds like a vent obstruction...does it change pitch with a change of fan speed?


mvaldes 11-20-2008 06:23 AM

You can definitely hear the air flowing through mine, at least on settings above 1. I wouldn't call it a "whistle" but it's definitely an air flow sound of some sort. I just assumed it was because the Smart was forcing a relatively large volume of air thru a relatively small duct system. I'll be interested in what your dealer has to say.

jetfuel 11-20-2008 07:43 AM

..what does it do when you set it for recirculation?


forestacademy 11-20-2008 08:03 AM

Turn up the radio
Thats what I do

jetfuel 11-20-2008 08:29 AM



Woody14619 11-20-2008 08:46 AM

I have the same issue if the heat selector isn't all the way open or all the way closed sometimes. I also get a whine out of the antenna if the window is down, and from the vents if they're all closed.

mvaldes 11-20-2008 07:06 PM

Mine sounds the same with and without the recirculation. It seems to be blower speed dependent - definitely noticeable but not annoying. (With or without the radio on!)

smartYsmileS 11-20-2008 07:10 PM

~ Mine whistles also, only when set to 2 or above . . . I've only used the heat so far so idk if the same is true of the AC . . .

dink74 11-21-2008 03:17 AM

Ours only does it when we have the heat on. I played with it some last night and found if I run the heat on highest setting for a few minutes and than change from hot to cold it stops when I go back to hot so it looks like the flap to seal off the hot from cold is not sealing properly when cold. May go away with time depending on how hard the seal is from the factory.


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