Furnace doesn't always light
Is there a good thread for troubleshooting furnace problems? Mine is not quite 3 years old and has worked fine until this week. Sometimes when the thermostat calls for heat the fan comes on but the...
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If the furnace doesnt even attempt to light (igniter not clicking) I would think it is probably because the sail switch is not moving properly and the system has a safety so it would not attempt to light until fumes from previous attempts is evacuated. Cleaning is probably all it needs.
