I have Quadrafire classic bay 1200 insert and its been great. This year its acting funny. It will run for a while (a few hours) and then the call light turns off (even though thermostat hasnt hit set temp). I tried messing with the thermostat thinking that was the issue. I shortcircuited the thermostat and even then, it would run, then for no apparent reason, the call light turns off and it stops feeding. Then a few minutes later it the light turns on again and its back. What gives? any ideas?