My old Carrier gas furnace heats just fine, but does something I don't recall it doing in the past. Whenever the thermostat has told the system to turn on and provide heat, I hear the burner re-igniting several times while the fan is still running. I assume that since I hear it igniting that it must have previously shut off each time, but have not verified this. It used to be that the burner would just light, fan would then start when heat exchanger reached a certain temperature, and burner would stay on continuously until thermostat was satisfied after which it would turn off and fan would continue for a period, then shut off. What would cause the system to now have the burner re-igniting several times during the run cycle, and is this something to really be concerned about? Thanks for any input.
- posted
16 years ago