Hopefully someone can give me a little advice being I've tried everything that I could think of. We have a quadrafire classic bay 1200 for about 5 years and now it'll run fine for a few hours sometimes then all of a sudden it wont restart without pushing the reset button on the side. It even does this with the thermostat all the way up. it has a new seal on the door, I've checked the vacuum switch and the thermocouple was just replaced. any help or ideas would greatly be appriciated