Fan clutch constantly engaged on my truck. Read around and I checked my flan clutch by spinning it while not running. It spins freely with minimal resistance. Reason Im asking about this again is because I can have the truck up to operating temperature after running it through town a couple times and the first stop light I hit the temp starts dropping unless Im hot rodding around takes alot to get it to operating temperature.. And once its there if I baby it around it starts dropping back down especially if I stop at home to run in and grab something I understand they run cooler but theres no reason it should be dropping to in between the first two notches of the temp gauge. Im sure this could be effecting fuel milage and other things. Im just really thinking its that sensor I dont know how often these go out my trucks only got 80000 on it. Anyone have any comments or suggestions?

 

Thermostat stuck open?

 

I agree with dangerous1965. Sounds like the thermostat is stuck open.

 

sounds like therm to me.

 

Alright thats a cheap replacement I'll give that a whirl thanks guys.

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Just cant understand why the fans constantly running?

 

The last I knew the current flash makes the fan run a lot more often, even when the defrost/AC is on...