My Enviro EF5 usually takes 2 times pressing the button for it to get up to temperature and stay on...well tonight i pressed it once and took the dogs for a walk...when i came back the house was filled with smoke and the smoke alarms where going off. The smoke was coming through the blower into the house. Is there anyway to stop that? Is that normal? The stove works pretty good other than that you just need to press the start button twice (15 min intervals).