signs of blower motor failure: fluttering?
Thread Starter
Senior Member
Joined: May 2013
Posts: 356
Likes: 33
From: NYC
glk
signs of blower motor failure: fluttering?
2013 GLK250:
I've notice intermittent fluttering sound coming from the far right passenger air vent. Sounds like a leaf or piece of paper fluttering. happens without AC (just heat) and also at idle, cabin filter was replaced 3 months ago
Before I start ripping stuff out, is this sound also a sign of blower motor failure? Its probably easier to DIY replace the blower motor than to poke around for a leaf/obstruction.
I've notice intermittent fluttering sound coming from the far right passenger air vent. Sounds like a leaf or piece of paper fluttering. happens without AC (just heat) and also at idle, cabin filter was replaced 3 months ago
Before I start ripping stuff out, is this sound also a sign of blower motor failure? Its probably easier to DIY replace the blower motor than to poke around for a leaf/obstruction.
Member
Joined: Oct 2020
Posts: 183
Likes: 41
From: Ottawa, Ontario
2013 GLK350 Canada
Remember that there's only one fan motor; if there's a problem with it, the sound should be from *all* vents, not just one. Try shining a light into the vent to see if you can see anything loose.
You might also try an inspection camera to look in the vent/duct e.g.
https://www.princessauto.com/en/comp...t/PA0008942989
Or
https://www.princessauto.com/en/24-i...t/PA0009009010
Price is in $CDN.
You might also try an inspection camera to look in the vent/duct e.g.
https://www.princessauto.com/en/comp...t/PA0008942989
Or
https://www.princessauto.com/en/24-i...t/PA0009009010
Price is in $CDN.
Member
Joined: Jan 2023
Posts: 88
Likes: 33
From: Blue Oval City, TN
2013 GLK 350
I have I believe a similar sound occurring. Makes me think of a thin piece of aluminum trim flexing or shifting back-and-forth in some way. Seems to happen when it’s cold, and the cabin is warming up. Mine is coming from two or three different places around the cabin including the right side of the dash and my drivers door panel. No idea what it is.
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,013
Likes: 281
From: South Texas
2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
What happens when you adjust the fan speed - does the noise increase as fan speed is increased, and vice versa??
And what happens when you close that particular vent?
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
I had a slight fluttering sound issue, only on low fan speeds, pretty soon after replacing the cabin filter. Ended up taking the cabin filter out and reseating, apparently it was slightly off.
Noise has stopped since.
Noise has stopped since.
Thread Starter
Senior Member
Joined: May 2013
Posts: 356
Likes: 33
From: NYC
glk
Still occurs with AC and on higher fan speeds and if i twist the vent. I think i'll try out andreigbs's suggestion of reseating the cabin filter which I DIY'd few months earlier. Someone also suggested to check the battery cover (which has some kind of inlet) which I also DIY'd last year
