I have a mt vernon quadra fire and have had it for over five years. Last winter it stopped turning on automatically when temperature was lower than set on thermostat. Took it to a local dealer and they could not find anything wrong. I have replaced several things, thermostat and wire twice, combustion blower, snap disc #2, and vacuum switch. I have increased the feed as well. Now that I am preparing for the cold weather, I am finding it to give me the same problems. After starting the stove and letting it reach temperature, it will shut off but the call light stays on. Anyone have any ideas what might cause the stoves light to stay on and not turn back on?