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Just found this board and looks like a nice interactive group. I have worked on and maintained my home heating systems (Buderus oil) over the years, installed a propane on-demand unit at a 2nd home, so know a little bit but far from an expert.
Trying to locate some advice on getting a Munchkin 80 burner back up and running. This unit is installed at my Mom's house in MA, is about 15 years old and it drives FHW heat and a HW tank . Has had its issues, but I havent been actively involved with the maintenance as she has had a somewhat local tech who was reliable. She just got back to her house after being away this winter and has no heat or hot water. The tech is no longer with the company and they cant get out until the END of next week, so I am in a jam. She is 2 hours away and I am only getting the info that she can visually see and tell me, so "maybe" a little stressful on this side.
Problem - The system will fire and jump quickly from 140 and right up to 198 or 200. It them shuts down but still has power. The reading will slowly go back down. No error code comes up other than a "d1 or d3". I have had her reset the system a few times but it does the same thing. From my searches, there should be an E or F code plus a number. Could it be a high temp cutoff switch? A friend of hers who is a contractor came over to take a look and said the high temp was set to 180.
Any suggestions on how to troubleshoot.