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Aux. Fans
Spring fever
I have never heard the aux. fans working in my car. how can I test them to see if there working and what temp are they supposed to come on. I heard there supposed to run when you turn on ac. true or false? 94S |
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I have heard the same thing about the A/C. Iam not sure about your car, but I was told that with a 450sl. Pull the single wire of the water temp sensor, front of engine, and ground the wire to the engine. Key on. Hopes this helps.
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Stable: 1973 450sl 1978 red diamond ice vette 1975 steel blue convertable vette 2002 steel blue dakota quad. |
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My understanding is they come on when either the engine gets up to about 105 at fast speed, or when the aircon is turned on, but spin at a slower speed.
You can trick the temp sensor by unplugging and shorting the cable, which makes it work as a closed switch. Mine didn't work originally but a few smart taps on the spindle of the fan and a dose of WD40 did the trick. I drilled a tiny hole in the fan cover and sprayed through that, and sealed up afterwards. |
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I assume you mean a 94 S class? If so, I believe low speed is tied to the A/C operation and the cut-in point for high speed is around 107C.
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Ali Al-Chalabi 2001 CLK55 1999 Dodge Ram 2500 Cummins Diesel 2002 Harley-Davidson Fatboy Merlin Extralight w/ Campy Record |
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