Furnace clicking
My furnace is coming on and clicking but not lighting. Help.
Forum Discussion
Check the intake and exhaust vents for obstructions such as bugs, spider webs, etc. If the air can't flow properly the sail switch will sense that and not allow the furnace to light. The burner orifice will not light if it is dirty or obstructed. But if you can hear the ignition clicking I would do as above mentioned and check that gas is getting to the furnace.
