waldo53,

What you say does make sense..I have been having a tough day on the old Bolt. My thought would be, if the fan was running all the time, which it shouldn't be, just to maintain 180&deg, what would happen when the truck needed more cooling. You can't run the fan more than 100% can you.

If he has a 180&deg thermostat in it, then the electric fan should help hold this temp by running only part time. The hotter the rig got, the more the fan would cycle until it was on constantly. This would only happen when it was hot outside and the truck was working like heck.

Right now, there is absolutely no reserve, the system is operating at max!

I think the idea of a electric fan is to be too efficient..engine temperature is then maintained by cycling it on and off. Does this theory make any sense.

Stuart