That's how I thought it worked too, based on what it was supposed to do. Unfortunately, I dont have another one - this is the only one on the panel - to test it against. If I understand you correctly, though, I should be able to see some resistance across it, right? Anyway, any idea what I can replace this with? Anyone aware of a US Based manufacturer that I can get one from? Thanks for the help so far - I think I'm on the right track.