What is a bad flame in a natural gas furnace?
Modern natural gas furnaces need a little attention to run efficiently. If the pilot light is burning with a bad flame, the furnace may be venting dangerous gases into the home. In most cases, troubleshooting a bad flame is merely a case of adjusting the air intake.FunctionThe pilot light in a natural gas furnace provides a reliable source of ignition for the larger gas burner which heats a home. A pilot light depends on the right ratio of natural gas and air to burn efficiently.Good FlameA correctly adjusted pilot light burns with a dark blue flame, possibly with a little yellow at the tip. It should burn steadily with no flickering and no excess noise.Bad FlameThere are two kinds of bad flames in a natural gas furnace. If the flame is getting too little air, it will burn yellow and the flame will dance around rather than being steady. If it is getting too much air, the flame will roar and the base of it will be slightly above the burner port.DangersA yellow flame is not burning natur
