It occurred to me recently that I haven't heard my cooling fan kick on. I was hauling some firewood today and just tearing around and I noticed the temperature light was on. Coolant level was fine but the bugger was hot. I let her cool down and began the obvious process of elimination. No blown fan fuse. Took out the fan and connected it to a battery and it kicked right on. Checked all connections, clean them up, hit them with a little WD-40. Reinstalled the fan and took it out for another drive. It didn't overheat until I parted in the driveway and let it idle in the sun. I'm assuming that as long as I'm moving, the radiator is getting enough air to cool it but then once I stop it overheats. Must be some kind of sensor or relay somewhere? Any ideas (and where can I buy one)?

 

Is this the temp sensor at the bottom of the radiator?

 

yup thats that is it. had the same problem twice on our 400 easy to fix.make sure when u put coolant back in to pinch hose just past thermastat and open bleeder screw and add till it comes out of bleeder on housing.i just used a needlenose visegrip to pinch hose.

 

Yup, I bought one a couple weeks ago and it did the trick. Thanks.

 

Just bought the parts last weekend and tried it. I got it working. Thanks for the tip.

 

I had to do the same on our's as well. Not too terrible of a job.