I was working on a Jotul B vent stove yesterday and I came across a problem that I could not figure out...The customer stated that the unit would shut down if they operated the unit on high but other than that, the unit is fine. This stove is at least 20 years old. Put the stove through a service to include cleaning the pilot and ran the unit. Everything worked fine on high and I concluded a dirty pilot to the drop. Almost cleaned up and then the pilot started to drop. Main burner flame looks good but when the unit gets hot, the pilot will start to turn yellow and come off of the TC, turn the unit down and the pilot comes back. Cool everything down and works fine on high until the unit gets hot again. Going to replace pilot assembly but now Im guessing and I dont like to guess. Anybody have the same problem before???