Help anyone!!!! I have a Thetford Tecma Silence Plus RV toilet. Recently the tank full red light stays on all the time. Would not override flush. It started when emptied tanks the green light would not be on but yellow 1/2 full light would be on. This went on for a month or so but on our trip to Montana the red light came on and nothing works! I spoke with Thetford and was told I would need to replace my double wall switch. Got it and did not fix problem. Again Thetford told me to get controller, I did and problem is the same except that now I can override a flush. Still red! Took RV to Britz RV & Marine in Billings. Over $300 later, they removed the red sensor and could flush toilet but would not know when tank is full. Not a long term solution. Spoke with Thetford again and they said to replace sensors. Just got them and installed to no avail. Still seeing RED! Can anyone PLEASE help me????? I've got over $1000 into a stupid toilet! Am I overlooking something. Seems Thetford is only playing a guessing game with me. HELP!!!!