I just thought I would throw my 2 cents into this conversation. I have had intermittent problems with our DSI water heater since I bought it. I wish I would have bought the basic one and not messed with the automatic one. I have one on a pop-up that lights every time and has never given me a problem. That said, I did diagnose the problem to be the ignighter. It would light the flame, but it would not tell the computer that it was lit. I tried my best to clean the wire, but it did not help. I bought a new ignighter and now it works perfectly. It is nice to turn it on from inside the trailer, but sometimes simpler is better.