I have a tempstar smart comfort furnace. It is very cold out- will not keep up with heating the house. Getting a code of soft lockout max. ignition reached. I turned the thermostat down to 2 degrees difference and the furnace will run but not to get to the 2 degrees. It is a propane furnace- 1000 gal tank with 45% new regulator this fall. New thermostat this fall.