When I moved into my house many years ago, the attic fan was broken. I replaced it and noticed a few years later that it was burned out again. I replaced that one and just noticed tonight that it to is burned out. Now I rarely go up in the attic (which is a crawl space), so I have no idea if these fans burn out after a week or after a couple of years. All of the fans have had thermostats. On the most recent fan I had it set to 110 degrees F.
Any idea why I have gone through three fans (or thermostats)? Is there a common gotcha I might be running in to? Spikey power? Flakey thermostats? Perhaps I am just overworking it at 110 F?