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#1
02-18-2008, 12:14 PM
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What could this sound be?
Hello,
For the last few cold days (below 39F) I have noticed a fan like sound coming from my right front dash vent. I tried the heater motor at different speeds, but the sound remains constant. As she starts to warm up the sound flutters a little, then completely goes away. Does this mean a repair down the road? Thanks for reading this. Hugh, Sr. 1984 190d 2.2 (waiting on insurance company to fix left front fender - Allied Van Line truck didn't swing out far enough when he made the turn toward Carthage, Tennessee) 
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#2
02-18-2008, 12:15 PM
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Could that be noise from the fan clutch? {does a 190 even have a cooling fan/viscous clutch?}
__________________
Jimmy L. '05 Acura TL 6MT  2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China"  Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
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#3
02-18-2008, 12:36 PM
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By fan noise do you mean rushing air or a motor running? Is it a new noise, or is it something that started when the outside temperatures got lower?
You may have some vacuum operated gizmos connected to the vent line and one of the actuators may be hissing until the engine temperature rises enough to change the climate control system command to that flapper. In my 1998 E300D TurboDiesel I get a number of such noises as things reposition themselves while I wait for the glow light to go off on a cold morning. Not sure I would get too worried about it, yet. Jim
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Own: 1986 Euro 190E 2.3-16 (291,000 miles), 1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000, 1988 300E 5-speed 252,000 miles, 1983 240D 4-speed, purchased w/136,000, now with 222,000 miles. 2009 ML320CDI Bluetec, 89,000 miles Owned: 1971 220D (250,000 miles plus, sold to father-in-law), 1975 240D (245,000 miles - died of body rot), 1991 350SD (176,560 miles, weakest Benz I have owned), 1999 C230 Sport (45,400 miles), 1982 240D (321,000 miles, put to sleep)
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#4
02-18-2008, 01:15 PM
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sounds exactly like a bad aspirator motor, this is the little fan that intakes air for the in car temp sensor, i have seen a few go bad and do what you describe.
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1967 250 S 1967 280SE 1968 250S 1971 280 SE 1973 220 1974 280 S 1975 450 SEL 1976 220 D 1979 300SD 1983 300 SD 1985 230 TE euro 1986 280SL 1986 500 SEL euro 1986 190E 2.3 1990 300 SE 2003 C230 K 2004 C230 K 1987 560SEL 1987 300SDL now in canada 2005 C230 1998 C43 AMG Sold to DON 1993 190E 2.6 300TD Former daily driver Totaled current: R320 CDI Ram 2500 Cummins
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#5
02-18-2008, 09:04 PM
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Quote:
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#6
02-18-2008, 09:14 PM
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I'm not sure if your car has the cabin air temp sampler, that sends the heat to the porcupine, to adjust the fan speed, like the 124 does. If it does, that could be making noise. It is located under the passenger side dash in the 124. Mine will make noise when it is really cold. I did lube it with some ATF (as GSXR suggested) that seemed to help.
Does that make sense? Same thing Carson suggest hours ago. 
__________________
1987 300TD 309, xxx 2.8.2014 10,000 mile OCI Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous “Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss
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