I have a Fraser Johnson Model FG9B06012DH11D. What started as an occasional issue now occurs almost daily. The furnace will fail to start when the temprature drops and the thermostat signals it to start. It will always start several hours later after the home has cooled down way below the setting. You can hear the furnace click and make a noise as if it is starting but the burner doesn't light even if you you turn the thermostat off and turn it back on and lower the setting. The repaiman says it appears to be in lockout and he has tried several things to no avail. Most of the time the furnace is working when he gets here and I know it's hard to diagonose an issue when none is present. When we got up this am it was 63. Around 9am the furnace started up without touching the thermostat. Now it's warm and no need for the repairmans visit. Please help!