It's easy enough to pull and test. At the risk of sounding like a Nike commercial, just do it. lol Bill Denton Yardley, PA wkdenton at verizon.net Lazarus Cycleworks, LLC Breathing New Life into Old Bikes ----- Original Message ----- From: "Steven Bixby" <steven at bixbys.net> Eh, this sounds like classic stuck-open thermostat to me.