Hello everyone, This sensor has been disconnected for a while now and I am trying to fix it. Does anyone know what this sensor do? Does it relate to the fan speed in any way?
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Radiator upper sensor disconnected
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Originally posted by D3R3K View PostIts the dual temp switch, turns on the aux fan when the temp up, and can turn the fan on low or high speed. is your car a early or late model, they changed the wiring when the late model came out and the switch
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Originally posted by e30strokr View Postyou definitely should hook up those wires correctly... this keeps the car from overheating when driving around town....
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Originally posted by roguetoaster View Post
The clutch on the fan is designed to make the fan more effective as the viscous coupling heats up, and less when cold.1990 325i
2004 330i Individual 6-speedsigpic
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Originally posted by IceWhite View Post
I understand the purpose of the clutch in the fan clutch, but, maybe I should have been more specific. If the aux fan keeps the car from overheating, then why is the fan and it's clutch also a part of the system? What is it's purpose?
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Originally posted by E3IS0 View Post
I think they both have the same purpose. So when the clutch fan cant keep the temp down by itself, the aux fan turns on to help cool the engine down and turns off when the temp desired has been reached.
wiring diagrams here
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