Englander stove 25-PDV bought in 2002 and manufactured 2001. Last year the unit would not start. After examining the back I realised that the vacuum hose had melted so I ordered and replaced that part. Now the Unit runs through entire startup procedure and runs in normal run mode for an additional half hour sometimes more. It then goes into the shut down process but the control panel still has the green light over the on button glowing. From what I have determined after numerous times having the stove apart following the instructions given by Englander I have narrowed the problem down to either the vaccum switch being bad, the heat sensor sensing too high temperature or the control board malfunctioning. I have replaced the vaccum hose and have replaced the heat sensor wire. Is there any advice for fixing this problem or at least determining the exact root of the problem?