I have a Breckwell P2000 insert with a thermostat. The stove has five power settings. I know this is not directly relatable to other stoves but my question is not platform-dependent--I think. There are two possible ways to use the thermostat. You set the desired temp and the stove turns off. It turns on again once the thermostat senses the room temp has fallen below the set temp. Or you set the temp and the stove goes to lowest power/feed setting once the temp hits the target and goes up to the higher level/feed when temp is below set temp. The manual says not to have either the high/off or the high/low modes be set so that the higher feed rate is more than three. In other words, don't have it go from four or five to either off or one. I don't understand the reason. In the high/off mode, it's no different from manually turning off the stove when it's at 4 or 5 for a while and then restarting. Same for going from 4 or 5 to a lower setting manually. Where's the problem?