Does a heater have a burn time relay of some sort? We recently had complete central heat and air installation in an old house and I'm starting to have an issue with the heater. The problem is when it doesn't keep up the heat source goes out after a period of time. It will not come back on until I manually turn the heat switch off and then back on. Another issue with this is the blower never stops and after a few minutes is starts blowing cold air due to no fire. The thermostat still says the heat is on when it's not. The blower does stop when I shut it off and back on. Yes I have call in to my ac guy.... I just won't be able to sleep at night think about this.