I can see the flame in my forced air box, it seems to be running and heating but the air is blowing cold. I unplugged the whole unit for a day. When I plug it back in, the thermostat is in the off position but the air blows cold anyway - it won't shut off (even though the thermostat is off) and keeps blowing cold air...any thoughts? It's a very cold christmas here!...

are you saying the burners are burning,,,,the blower is blowing ,but blowing cold air,,,,something just don`t sound right. are you seeing the burners burning or are you seeing the pilot burning,,,,is it big blue flames or one little single flame?