Join Date: Apr 2008
Motorcycle: 2006 GSXR 600
Re: radiator fan not turning on?
when i bought my bike the the radiator was shifted to the left from being laid down. When you look you can see the radiator mounts are all twisted and bent to one side. This in turn bent the radiator inward toward the fan preventing the fan from spinning.
Try turning your fan by hand with your finger. See if it spins freely, if not, then investigate why it's not spinning freely.
Then do as others suggested. You can check your thermo switch by pulling the plug on the connector and shorting it out with a paper clip. If the fan kicks on, then your thermo switch is bad. If the fan doesn't kick on, you've got another problem.
If the temperature on your display looks correct, about 220F is when the fan kicks on, then it's obviously not your ECT sensor because it's working fine. You can see it on the LCD display.