A fan that only runs "on demand" whem the fluid temp is high should outlive its owner, unless you're pulling a 24 foot goose neck trailer all the time. While you're at it, lose a little sleep worrying about about why the kitchen faucet isn't dripping!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!