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#1
10-03-2003, 05:32 PM
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300E aux fan not coming on..HELP!!
Hello Board,
I thought my radiator was the culprit of my overheating problems, it turns out that the aux fan is not cutting in at 100C or at any temp above that . It works when my A/C is on, but when I turn off the A/C the fan turns off about 10 seconds after. By then the temp is about 100C. When the temp rises over 100 C it does not become activated, what could be the culprit?? Temp sensor?? HELP!!
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1987 mercedes 300E 1995 e320 conversion(hated the 300e grill) HID/Xenon (D2S) Keyless Entry Monochromatic Paint (Custom Blue) Smoked Tails Flat Badged (front) Debadged (rear) custom "carbon fiber" console 18 inch HP EVO rims Sold! Now I drive a Monte Carlo SS http://memimage.cardomain.net/member.../352975_67.jpg http://memimage.cardomain.net/member.../748335_24.jpg 
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#2
10-03-2003, 05:43 PM
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The temp gets all the way to 120 C and the fan still does not cut in.
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1987 mercedes 300E 1995 e320 conversion(hated the 300e grill) HID/Xenon (D2S) Keyless Entry Monochromatic Paint (Custom Blue) Smoked Tails Flat Badged (front) Debadged (rear) custom "carbon fiber" console 18 inch HP EVO rims Sold! Now I drive a Monte Carlo SS http://memimage.cardomain.net/member.../352975_67.jpg http://memimage.cardomain.net/member.../748335_24.jpg
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#3
10-03-2003, 08:27 PM
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thermoswitch
The thermoswitch that controls the HI SPEED FANS is located on the top of the cyl head on the 103 engine.There are two plugs there,the one with two wires runs the fans.Disconnecting this plug with the ign "on"should turn fans to HI speed.If this happens ,chances are the sensor in the head is faulty...approx 25.oo for the part,5-10 min to change.Hope this helps.
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#4
10-03-2003, 08:53 PM
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Is that the one with the 2 black plugs??
There is one with 2 black plugs. (near #6 spark plug) One with 2 prongs and a plug(near #3 sparkplug) and One with 2 vacuum lines(near #1 sparkplug)
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1987 mercedes 300E 1995 e320 conversion(hated the 300e grill) HID/Xenon (D2S) Keyless Entry Monochromatic Paint (Custom Blue) Smoked Tails Flat Badged (front) Debadged (rear) custom "carbon fiber" console 18 inch HP EVO rims Sold! Now I drive a Monte Carlo SS http://memimage.cardomain.net/member.../352975_67.jpg http://memimage.cardomain.net/member.../748335_24.jpg
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#6
10-06-2003, 12:25 PM
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Mine worked differently. The plug on the sensor needed to be jumped to trigger fan. Oh, and my sensor is green, and I have 1 aux fan.
Setup must vary somewhat, depending... Perhaps this will help. Best of luck.
__________________
1986 300E 5-Speed 240k mi.
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#7
10-07-2003, 01:17 PM
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Mine is like csnow.
I need to jump the 2 terminals to run the fan, or directly ground one of the 2.
__________________
1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified
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