[OldFoggey]

Thanks for the replies..........

Rick, I already have a switch factory installed but I'm not sure what thread size it is without draining the radiator to pull it out. I was hoping that some other BackDraft owner might have changed theirs and remembers something about it. I can order a replacement from BackDraft but they are fairly expensive at $38 plus shipping and the wait.

Karl, it seems like having the fan run anytime the ignition is on would be putting unnecessary wear on the fan. Since the majority of my driving time in highway I don't think my fan runs less than 5% of the total time the car is running. I would much rather have it just run as needed.

Thanks..........Don