Were you at extremely high elevation? Say above 8000 feet? Propane appliances do not like high altitudes. I had a slightly similar problem myself. My heater would run for a minute then shut off, then 2 minutes later it would cycle again. In my case I had installed a digital thermostat which is way more sensitive. (less temp swing) my thermostat is located in the aft bedroom right above the hot air duct and closed to the main hot air duct buy the furnace. So, the thermostat would reach selected temperature very fast and the rest of the coach would be cold. My temporary solution was to block the hot air duct in the bedroom with my laundry bag and close the the bedroom curtain 3/4 of the way so the hot air is slower to reach the the thermostat. works perfect now. I am going to order some adjustable heater vents so I can close off some of the hot air in some areas ad get full flow in others. fine tuning
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