Yea I know that..it turns on when it detects temps of 91-95 degrees celcius. But my question is how long does it take for the coolant to reach those temps under normal idling and air temps we are experiencing lately (approx 14 degrees air temp). I thought that idling the car for 10mins would cause the fan switch to turn on. Perhaps I should rev the car to 3000rpm and hold it there to bring the heat up more?
The fan will turn on with the car's idling.
Have you tested for power to the switch? If there's power to the switch, and the switch works then the fan will come on.
OK I finally fixed the problem although I don't even know what I did to fix it. I just took out the fan switch again and gave it a real good clean (there seemed to be some sort of calcium buildup on the probe)..so I used some vinegar and gave it a good scrub. Then gave the electrical contacts a squirt with contact cleaner, let it dry and re-assembled. It took quite a while for the fan to turn on but it did (around 15-20mins of idling).
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