[Moondragon]

You didn't have an issue last year, so what has changed since then? Have you added or rearranged any furniture? I had one trailer where the heat was ducted under the sink into the living room, where it promptly hit a chair, causing the heat to rise and hit the thermostat right above the chair. On/off/on/off/on/off, until it finally fractured the ceramic innards of the furnace. Repaired the furnace, made a duct extender out of cardboard, problem gone.