[E.Diane]

It's either bad or just doesn't kick in soon enough? Like mentioned, mine wouldn't turn the fan on until the temp gauge was a needle width from fully red. By that time, it was usually too late to bring the temps back down.

Taking a look at my service manual, on rising temperature, the fan switch should activate at 225 to 235 degrees F. On falling temp, it clicks off at 219 degrees. That's pretty hot.