I have been reflecting on last winters performance and I had a big problem running my stove off the thermostat while away from home. I'd set it on medium and go to work and come home to a freezing house. I'd like to get around this some how this year. Is there some way to tweek this older model stove? It will only stay running if I am not constantly monitoring it or I can set it on high, leave it there and set the thermostat up to about 90.