Peter, I would have ordered it from Fastlane, except that I'm planning (hoping) to leave tomorrow, and by the time I realized that i needed to replace it, it was too late to order it and get it on time.

BTW, I just confirmed that the thermostat's bad. I think it started cracking open at 110°F, and it's definitely open (not all the way, but it's open) at 135°F. It's supposed to open at 80°C, which according to a conversion table should be 176°F. So, thus ends the debate as to whether the thermostat's really what's wrong.

BTW, it's a good thing I'm flushing this sytem out; it's really horrible...pure rusty water, and getting everything nice and clean's gonna be a PITA...but I'm workin' on it