Jun 15, 2015, 12:34 PM
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Squeaky interior heater fan.... anyone else?
Thread Starter
Super Member
Joined: Apr 2010
Posts: 770
Likes: 9
2017 C43
Squeaky interior heater fan.... anyone else?
Now I'm not sure how the HVAC system is set up in these cars, but on the passenger side of mine, when i turn up the fan to past 3 bars, there is a squeaky rotational sound - sort of like a hamster running really fast on a rusty wheel.
It comes and goes, happens more on very cold mornings (30's) and seems to be encouraged when hitting sudden jolts in the road.
Anyone had an issue with this? Is there a TSB or a quick known dealer fix?
It comes and goes, happens more on very cold mornings (30's) and seems to be encouraged when hitting sudden jolts in the road.
Anyone had an issue with this? Is there a TSB or a quick known dealer fix?
Junior Member
Joined: Oct 2007
Posts: 34
Likes: 0
C300 4matic
Mine did the same thing after 2 years. The first winter I had the car the fan froze up solid due to wet snow, they repaired that problem with a deflector of some sort but then the next winter I got the noisy fan. They then replaced the fan motor under warranty.
Member
Joined: Jun 2002
Posts: 106
Likes: 1
From: IL
08 C300 4-Matic, P1 P2 MM iPod Kit
Same thing here for me. Just started happening this winter (55,000 miles). Coming from the passenger side as far as I can tell. Quite annoying. Any DIY fix or suggestions on how to fix (other than going to the dealer)?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
It's a common problem on Mercs. Pull the blower & lubricate the squirrel cage bearing with thin grease - or replace.
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Newbie
Joined: Jan 2010
Posts: 14
Likes: 0
w204 180K
The same started to happen to me last week. However, mine only does that when I push the button for the indoor air circulation. Would that be the same issue? By the way, it disappeared by itself at the moment.
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Newbie
Joined: Mar 2012
Posts: 14
Likes: 0
2008 C300 Sport 4MATIC
I have the same issue. It is accentuated when I have my heat/fan up high, and when hitting hard bumps or turning sharp corners. The noise happens when idle and when driving, however it is accentuated when I hit the pedal.
Any tips on how to DIY fix? I'll try greasing/fidgeting with the blower this afternoon, but anything else would be appreciated!!
Thanks.
Any tips on how to DIY fix? I'll try greasing/fidgeting with the blower this afternoon, but anything else would be appreciated!!
Thanks.
