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Old 03-17-2013, 11:40 PM   #1
E RaK
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There's a bird in my car - HVAC noises

So this winter I've come across a new niggling issue. On cold mornings, the HVAC fan makes a beautiful chirping noise for 2 or 3 minutes before the air in the system gets warm. It's not too loud, but definitely a little annoying. Any suggestions? I don't need potential buyers looking for a nest under the hood.
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Old 03-18-2013, 03:33 AM   #2
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http://forum.e46fanatics.com/showthr...blower+fan+diy
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Old 03-18-2013, 03:45 AM   #3
djantlive
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Change cabin filter first. That could solve it without changing the fan itself. Sometimes it is caused by leaf
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Old 03-18-2013, 08:03 AM   #4
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Before you replace the main blower fan, try and replace the climate control panel, which houses it's own little micro fan that likes to "scream" a lot. There's two versions. One is very deep, very crude, and has a big fan. This is the one that has the fan control buttons on the bottom of the panel. The newer version is shallower, cleaner, and has a smaller fan. This one has the fan control buttons on the side of the panel.
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Old 03-18-2013, 08:12 AM   #5
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Mine does that in very cold mornings too. It's really annoying. It comes directly from the center blower area, so I am positive that the blower fan is it. Problem is, that sucker is expensive.

http://www.ecstuning.com/BMW-E46-330...ower/ES240464/

Ouch.

http://www.ecstuning.com/BMW-E46-330...wer/ES2129904/

This is much cheaper, but I question its quality since it is MTC...
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Old 03-18-2013, 08:20 AM   #6
Sweetness
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^MTC Fans have known to go bad or noisy within a year or so. If you buy a Bosch Fan, apparently it has dettachable fins that make the install 100x easier
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Old 03-18-2013, 08:58 AM   #7
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64113453729

$120 for Behr fan assembly. The part number above was superceded by this one.
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Old 03-18-2013, 09:03 AM   #8
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Spring is right around the corner, turn your radio up for the first couple minutes
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Old 03-18-2013, 04:30 PM   #9
E RaK
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Originally Posted by SurreyF1 View Post
Spring is right around the corner, turn your radio up for the first couple minutes
I certainly am doing this

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Originally Posted by Sweetness View Post
Before you replace the main blower fan, try and replace the climate control panel, which houses it's own little micro fan that likes to "scream" a lot. There's two versions. One is very deep, very crude, and has a big fan. This is the one that has the fan control buttons on the bottom of the panel. The newer version is shallower, cleaner, and has a smaller fan. This one has the fan control buttons on the side of the panel.

Is there any way to determine whether or not the climate control unit is the issue once it is out of the car?

Assuming it doesn't have to do with the cabin filter, neither piece is looking to be a cheap fix

Thanks for the info and PNs guys.
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