Annoying fan noise from AC Vent
Thread Starter
Junior Member
Joined: Jan 2006
Posts: 20
Likes: 0
From: MD
2014 E-350 Sport 4Matic
Annoying fan noise from AC Vent
Since the cold weather started, I have continuous annoying noise coming from the AC vent. The noise is on most of the time, but it goes away for a moment when I steer the steering wheel and then come backs on again. When I turn the AC completely off including the fan, the noise goes away. If I only turn the AC off, the noise continues so I'm thinking it is the fan/blower that's making this sound. The noise almost goes away when the fan is on lowest setting and increases when I turn it higher. The noise is primarily coming from the far right passenger side vent.
Is there ANYTHING I can do to fix it? Hoping that I don't have to get the whole dash taken out to address this issue.
Is there ANYTHING I can do to fix it? Hoping that I don't have to get the whole dash taken out to address this issue.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Check the blower for possible dirt on the blades.
How many miles? When those blowers last for very long time, they are not officially serviceable and when you have a problem with it - you need to buy new one.
How many miles? When those blowers last for very long time, they are not officially serviceable and when you have a problem with it - you need to buy new one.
Member
Joined: Jan 2019
Posts: 163
Likes: 176
2015 E350 4Matic Wagon, 2018 GLE350 4Matic
I had mine replaced under warranty @ 36,000 miles. There are multiple thread topics on how to clean and/or replace, it doesn't look too difficult.
Here is one: https://mbworld.org/forums/e-class-w...-footwell.html
Here is one: https://mbworld.org/forums/e-class-w...-footwell.html
Thread Starter
Junior Member
Joined: Jan 2006
Posts: 20
Likes: 0
From: MD
2014 E-350 Sport 4Matic
I'm at 110k miles now. Will try to clean the blower and replace if necessary.
Thread Starter
Junior Member
Joined: Jan 2006
Posts: 20
Likes: 0
From: MD
2014 E-350 Sport 4Matic
I had mine replaced under warranty @ 36,000 miles. There are multiple thread topics on how to clean and/or replace, it doesn't look too difficult.
Here is one: https://mbworld.org/forums/e-class-w...-footwell.html
Here is one: https://mbworld.org/forums/e-class-w...-footwell.html
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,273
Likes: 129
From: Orlando, FL
2015 GL550 4matic
If it sounds like crickets having a party in your dash, just replace the blower. $48 for a blower on Ebay and 3 screws up under the passenger side of the dash. It should take 10 minutes. I need to do mine, I'm just too cheap and lazy. It does seem to come back when the weather gets colder, comes and goes sometimes.
https://www.ebay.com/itm/Heater-A-C-...8/332701415871
https://www.ebay.com/itm/Heater-A-C-...8/332701415871
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
If it sounds like crickets having a party in your dash, just replace the blower. $48 for a blower on Ebay and 3 screws up under the passenger side of the dash. It should take 10 minutes. I need to do mine, I'm just too cheap and lazy. It does seem to come back when the weather gets colder, comes and goes sometimes.
https://www.ebay.com/itm/Heater-A-C-...8/332701415871
https://www.ebay.com/itm/Heater-A-C-...8/332701415871
I order small part from China and tracking shows as follow
ChengDu to San Francisco 2 days
San Francisco to Las Vegas 5 days.
Go figure.
Last edited by kajtek1; Dec 12, 2019 at 04:11 PM.
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From: Zion
W212 E550 4M P2
Senior Member
Joined: Apr 2012
Posts: 432
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From: Just north of Detroit,Michigan
2012 E350 4Matic P2
Since the cold weather started, I have continuous annoying noise coming from the AC vent. The noise is on most of the time, but it goes away for a moment when I steer the steering wheel and then come backs on again. When I turn the AC completely off including the fan, the noise goes away. If I only turn the AC off, the noise continues so I'm thinking it is the fan/blower that's making this sound. The noise almost goes away when the fan is on lowest setting and increases when I turn it higher. The noise is primarily coming from the far right passenger side vent.
Is there ANYTHING I can do to fix it? Hoping that I don't have to get the whole dash taken out to address this issue.
Is there ANYTHING I can do to fix it? Hoping that I don't have to get the whole dash taken out to address this issue.
I decided to buy a direct replacement OEM motor made by Behr. I was able to find one for $121 form AutohausAZ. See attached pictures which shows that the original motor was a Behr. The price for the blower motor from MB is $348 list.
Anyway good luck,
Bob
Last edited by mercy-me; Dec 24, 2019 at 05:23 PM.
