Hi,
I have acomfortmaker gas furnace. The blower was replaced over the summer. I have a honeywell programmable thermostat. The unit is short cycling. I hear the unit turn on and it stays on for about 5minutes. It does not light and the burner does not turn on. 1 minute after this happens it starts up again and the burner lights and blower turns on. It runs for about 5 minutes. All this time the temp on thethermostat remains at its set point 68. What could be causing this?