https://youtu.be/0WahKBLEUgQ
6 month old 24f furnace started doing this on our new years camping trip. Temps were in the 30s at night, tank was full, medium and low and it would do this. Thought it was a 12v problem so put new batteries in halfway through our trips and topped off the propane. Took it to the dealer and just got it back. They cannot recreate problem and furnace is working great. Any ideas? Temperature, regulator, thermostat???. What else can cause this and what can I do to resolve?