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  #1  
Old 01-09-2002, 07:01 PM
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Location: Raleigh, NC
Posts: 51
92 400E Noisy Blower Fan ??

I recently noticed what sounds like a noisy fan motor coming from the general direction of the passenger side A/C vent. The sound is sometimes a high-pitched squealing noise and at other times a low-pitched churning noise. I am assuming this must be the blower fan.

What seems strange is that I hear the noise even when the Climate Control System is in the OFF position.

Does/should the blower fan run even when the Climate Control system is turned off ?

If not, does anyone have an idea of what/where this noise may be coming from ?

Thanks in advance for any help.......
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  #2  
Old 01-09-2002, 07:16 PM
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I believe there is a small recirculating fan behind the passenger-side dash that could make this noise.

:-) neil
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  #3  
Old 01-09-2002, 07:41 PM
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Location: Raleigh, NC
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Aha ! I sort of expected as much, since I noticed that when I activated the Climate Control System fan that the noise was not affected.

Anyone know if this is a DIY'er repair or replacement and how to get started ?

Thanks,
RM92400e
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  #4  
Old 02-25-2002, 02:53 PM
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If indeed this recirculation fan exists, is there anyone who could provide information on how to get to this thing ?

This noise is driving me bonkers....

Thanks,
Ray
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  #5  
Old 02-25-2002, 04:24 PM
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Join Date: Oct 2001
Location: Canada
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Try this one:
http://mercedesdot.com/current_issue.htm

My 92 400E has similar problem, mine only happens during the first 2 seconds after I turn A/C on/off.
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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.
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  #6  
Old 02-25-2002, 04:40 PM
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Location: Raleigh, NC
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Thanks Carman850, but....

as I said in my original post, this problem does not appear to be related to the Climate Control System blower fan that your URL link refers to. The problem occurs when the Climate Control System is in the OFF position. I even tried turning the CCS on and off when the problem occurs. Doing this has no affect on the problem, so that leads me to believe that the blower fan is not where the noise is coming from.

Still looking for help.....

Thanks,
Ray
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  #7  
Old 02-25-2002, 07:48 PM
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You need to remove the lower dash panel on the right side to access the recirculation fan.

:-) neil
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  #8  
Old 02-25-2002, 10:09 PM
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Location: Raleigh, NC
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Thanks, Neil !

I'll crawl under there next weekend and see what's involved....

Ray
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