[cashman]

If it reads a constant number while turning the contact is either permanently opened or permanently closed. I believe that is your problem. Once warmed up it will operate correctly. Here is a picture of my sensor. I had to cut it open to see what I could figure out. The switch is within the glass bubble. I believe it is a mechanical connection. Once it is magnetized the switch closes and that is what provides the continuity. Off magnet, switch is open. The switch is so small I cannot see it actuate if this is in- deed how it works. Someone smarter than I am will have to elaborate if this is not how it works. Your symptoms are exactly as mine and I have not had a problem since I installed the new cable.