[HayZee518]

Thank you for sharing all that information. My first exposure to the monitor is when I moved into this house in upstate NY. People would mention the "monitor" and I had no idea what they were refering to. I was very cautious in even looking at the heater. But having a strong mechanical back ground and electrical back ground it got my curiousity up as to what makes this thing work. I had no operator's manual or service manual. I had to figure out what the buttons did on the M41's top panel. There's a distributorship about 30 miles from me and my first problem was the combustion blower. I called the guy and explained that it sounded like a jet engine winding out. He said it was bearings going bad. I paid $146 for the blower motor and put it in. I had mounted the blower wheel backwards and after fully assembled it, it wouldn't spin. So I took it apart again and got the blower wheel in correctly but I forgot to put in a spacer so again it wouldn't work. Back apart and this time everything worked. I called the mpi guy and asked if I could get a service manual for the M41. One guy said "no way!" his partner said He'd get me one. So I was on the road to servicing my monitor. I broke the quartz window one day and went to the mpi guy for another window and he quoted me $90 for the quartz window. Since it wasn't really cold I got on the web at mcmaster-carr industrial supply site and found BORO-SILICATE glass. The temperature rating of boro-silicate is much higher than quartz and not so brittle. I only paid about 8 bucks for a piece four by 8 inches. I looked into gasketting material too. Again I found asbestos free gasket material with a higher than monitor's temperature ratings and bought this I got a sheet approx 1/2 inch thick, layered, by 3ft by 4 foot for 15 bucks. I tried it with kerosene on fire and it wasn't touched by the flame. It got black but did not disintegrate even after a 8 hr burn time. shortly after solicitating questions on the home repair site I started to get inputs to my problems and enhanced my studies further. one guy had copied the monitor service manual into a pdf format and I downloaded this. so I got a saved copy of it. Now people are writing ME with their problems. One man is calling me the monitor guru. I'll try to help but I am far from being a guru.