[RandalJ]

Thanks for the reply, jc.

I will give it a try. I won't be able to put it to the real test until it gets hot again (it's overcast and in the 90's today).

After I posted I realized that the temp in the engine compartment would actually be a lot higher than an ambient 100 or 105, expecially if the A/C is on, so my idea of setting the pot to match your sensor specs at those temps would probably have been way off. It's probably 130 or more in there.

Probably best to go with a sensor like yours. Do you have a manufacturer and part number? Where you bought it?

Thanks again...