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C class w204 Fan whirring noise

d0bbsy

New Member
Joined
Jun 9, 2023
Messages
14
Location
Northants
Car
2014 c63
Hi Everyone,

I've noticed a whirring noise coming from behind the dash recently. It comes and goes but its starting to annoy me, I have changed the fan blocker motor but its still there with the a/c on or off and only stops when switching the heater controls off.

Any idea's what I should check.


Cheers 👍👍
 
I had a similar problem on an Audi a few years ago, I turned out to be, a piece of insulation had dropped down and was rubbing on the fan blades, might be worth a look.
 
I had a similar problem on an Audi a few years ago, I turned out to be, a piece of insulation had dropped down and was rubbing on the fan blades, might be worth a look.
Thanks for the reply. I changed the fan blower a few weeks ago behind the glove box and didn’t notice anything as it’s in its own compartment. Is there a secondary fan do you know ?

Thanks
 
I think there maybe a small temperature sample fan, for the climate control to set it’s temperature, but I’m not really sure if Mercedes use them tbh.
 
I think there maybe a small temperature sample fan, for the climate control to set it’s temperature, but I’m not really sure if Mercedes use them tbh.
ah ok thanks for your post, I may take out the stereo and go for a drive see If I can hear where its coming from.
 

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