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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IT is not necessary to pull the covers to check the sail switch.
On the control board there is a multi pin MOLEX connector.. I think it is top front but I'd have to look at mine... This connector has a 12 volt lead. A "Thermostat" lead, a "Sail Switch" lead and as I recall one other important lead. What it does NOT have is power to the blower or board.
USe your volt meter, (or a test light) either one will CLEARLY show the sail switch closing, Assuming it's closing.
On the control board there is a multi pin MOLEX connector.. I think it is top front but I'd have to look at mine... This connector has a 12 volt lead. A "Thermostat" lead, a "Sail Switch" lead and as I recall one other important lead. What it does NOT have is power to the blower or board.
USe your volt meter, (or a test light) either one will CLEARLY show the sail switch closing, Assuming it's closing.
