Quote:
Originally Posted by carl n susan
Before you start tearing things apart, read the Furnace Diagnostic PDF here in the Files section (Here). There are LEDs on the furnace which should identify the problem. From your description I would suspect the "Sail Switch". But follow the diagnostic instructions to be sure.
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One flash every 3 seconds tells me the limit switch is a possibility. I have the furnace removed, now just to find where the switch is located (google ought to do it). I should have this thing pumping warm air by no later than June. Haha!