Strange Humming from Dash

Eric_M328i · 03-01-2018, 10:49 PM

Hey guys,

2008 328i Auto

Been hearing a strange whining/Humming noise lately. The noise primarily comes from the dashboard area. This isnt something new and would be a rare occurence ever since I first got the car almost 2 years ago. Lately its been happening almost every time the car warms up. I thought it was AC related at first but I don't think thats the case. It doesnt correspond to RPMs and I dont think it has to do with power steering. I did notice When I switch from gears the noise lowers and comes back. Old threads didnt help much. Anyway attached a video. Its a very low noise I hope u can hear it. Any Ideas or experience from anyone? Thank you!

BimmerNugget · 03-01-2018, 11:32 PM

Perhaps the blower motor on its way out?

dsjr2006 · 03-02-2018, 11:52 AM

I have a buzzing/humming noise coming from my blower motor in the HVAC that needs replacement or oiling. I can't tell because your car is running, but did you try turning the HVAC fan off to see if it goes away, or turning it up to see if it gets louder?

Also try turning the A/C on and off manually with the fan on full.

nsjames · 03-02-2018, 12:07 PM

mine had a buzzing. It was the tiny fan in the HVAC controls that let's it sample interior temp.
I pulled it and oiled it's little bronze bushing, fixed.

Eric_M328i · 03-02-2018, 01:33 PM

Quote:

Originally Posted by BimmerNugget

Perhaps the blower motor on its way out?

I was actually thinking that too but I saw a video with a failing blower motor and it made a different noise

Eric_M328i · 03-02-2018, 01:43 PM

Quote:

Originally Posted by dsjr2006

I have a buzzing/humming noise coming from my blower motor in the HVAC that needs replacement or oiling. I can't tell because your car is running, but did you try turning the HVAC fan off to see if it goes away, or turning it up to see if it gets louder?

Also try turning the A/C on and off manually with the fan on full.

Oh I see. Its happened before when my HVAC fans been off and the noise continues. I believe its happened without me even turning it on but Im not 100 percent sure.

opjose · 03-02-2018, 01:49 PM

The radio system also has a cooling fan that remains on until sleep.

Eric_M328i · 03-03-2018, 04:24 PM

Quote:

Originally Posted by opjose

The radio system also has a cooling fan that remains on until sleep.

What fan?

Eric_M328i · 03-03-2018, 04:25 PM

I played around with the AC/Heater a bit and no change. Weird thing is the sound doesn't come for a while then it just starts out of nowhere. So it might not be the blower motor. Doesnt really bother but Im still curious why

opjose · 03-04-2018, 05:18 AM

Quote:

Originally Posted by Eric_M328i

What fan?

In the radio or on back.

Eric_M328i · 03-04-2018, 02:26 PM

Quote:

Originally Posted by opjose

Quote:

Originally Posted by Eric_M328i

What fan?

In the radio or on back.

Video says CCC idrive cooling fan but I dont have idrive. Do I still have it with the bmw prof radio?

Eric_M328i · 03-06-2018, 08:46 PM

Quote:

Originally Posted by Eric_M328i

Quote:

Originally Posted by opjose

Quote:

Originally Posted by Eric_M328i

What fan?

In the radio or on back.

Video says CCC idrive cooling fan but I dont have idrive. Do I still have it with the bmw prof radio?

Found out the DME also has a little fan I wasnt aware of. This might not be it but ill check it out

03-01-2018, 10:49 PM	#1
Eric_M328i Second Lieutenant 122 Rep 209 Posts Drives: 2023 M340i (Build) Join Date: Oct 2017 Location: Los Angeles iTrader: (0) Garage List 2023 BMW M340i [9.14]	Hey guys, 2008 328i Auto Been hearing a strange whining/Humming noise lately. The noise primarily comes from the dashboard area. This isnt something new and would be a rare occurence ever since I first got the car almost 2 years ago. Lately its been happening almost every time the car warms up. I thought it was AC related at first but I don't think thats the case. It doesnt correspond to RPMs and I dont think it has to do with power steering. I did notice When I switch from gears the noise lowers and comes back. Old threads didnt help much. Anyway attached a video. Its a very low noise I hope u can hear it. Any Ideas or experience from anyone? Thank you!
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03-01-2018, 11:32 PM	#2
BimmerNugget Crazy Frog 543 Rep 1,212 Posts Drives: L.L.Bean Bootmobile Join Date: Jun 2017 Location: 560 State Street iTrader: (0)	Perhaps the blower motor on its way out?
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03-02-2018, 11:52 AM	#3
dsjr2006 Captain 157 Rep 848 Posts Drives: '01 E39 540iA, '09 E90 M3 Join Date: May 2013 Location: Metro Detroit iTrader: (1) Garage List 2010 BMW 335i [0.00] 2001 BMW 540i [0.00]	I have a buzzing/humming noise coming from my blower motor in the HVAC that needs replacement or oiling. I can't tell because your car is running, but did you try turning the HVAC fan off to see if it goes away, or turning it up to see if it gets louder? Also try turning the A/C on and off manually with the fan on full. __________________ E90 M3 DCT LCI \| E90 LCI N54 M-Sport(retired) \| E90 Technical Docs download: http://j.mp/bmwe90docs *good read, very detailed.
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03-02-2018, 12:07 PM	#4
nsjames Brigadier General 2443 Rep 4,330 Posts Drives: 08 328xi Touring Join Date: May 2017 Location: ohio iTrader: (0)	mine had a buzzing. It was the tiny fan in the HVAC controls that let's it sample interior temp. I pulled it and oiled it's little bronze bushing, fixed.
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03-02-2018, 01:49 PM	#7
opjose Major 242 Rep 1,353 Posts Drives: 335xi Join Date: May 2016 Location: Md iTrader: (0)	The radio system also has a cooling fan that remains on until sleep.
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03-03-2018, 04:25 PM	#9
Eric_M328i Second Lieutenant 122 Rep 209 Posts Drives: 2023 M340i (Build) Join Date: Oct 2017 Location: Los Angeles iTrader: (0) Garage List 2023 BMW M340i [9.14]	I played around with the AC/Heater a bit and no change. Weird thing is the sound doesn't come for a while then it just starts out of nowhere. So it might not be the blower motor. Doesnt really bother but Im still curious why
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