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  #1  
Old 06-02-2007, 10:56 PM
FineOlBenz's Avatar
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Join Date: Dec 2001
Location: Sonora California USA
Posts: 389
Auxilary fan problem HELP it's HOT

Ok first off the car is a 1982 300D. The auxilary cooling fan does not come on with the temp sensor at the thermostat grounded. It does however come on when I close the loop at the AC temp sensor at the filter drier. I have a voltage at the wire leading to the temp switch at the thermostat housing ranging from 3.25 to around 13 volts. The voltage is there even when I remove the relays located on the left fender well. Engine temps are getting to nearly 100 degrees. Is that hot enough to make the temp sensor ground the circut?

Now what?
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1984 280SEL, 62,000 miles
Euro model in the USA
1983 300D (Totaled out 10/2004)
New Factory Mint Green paint
Palomino int
1982 240D (Steak dinner for two)
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  #2  
Old 06-03-2007, 01:58 AM
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Location: New Orleans LA
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Fans

No it is between 110 and 115 deg C but it should come on low with the a/c on and go to high if the temp. goes above the 110 mark
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1990 300SEL
1994 E320
1989 E300
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  #3  
Old 06-03-2007, 02:14 AM
FineOlBenz's Avatar
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Join Date: Dec 2001
Location: Sonora California USA
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Why???

Why won't the fan come on when I ground the wire for the temp sensor?
__________________
1984 280SEL, 62,000 miles
Euro model in the USA
1983 300D (Totaled out 10/2004)
New Factory Mint Green paint
Palomino int
1982 240D (Steak dinner for two)
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