I bought a house with a sunroom heated by a Vermont Castings gas stove with a problem the HVAC/stove repair person hasn't solved by replacing the thermocouple, valve($$$) and taking apart and cleaning. I think it was installed in '89.
When the stove 'shuts off' after reaching the desired temperature, there is a 'poof' sound and occasionally the pilot light is blown out. This happens, on average, once a week. Sometimes 3 times a day. The pilot is all blue and covers all the pieces. The repair person is out of ideas, besides 'get a new one', which I can't do right now.
Any ideas, please?