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If you turn off an back on does the unit go straight to 3 blinks?
and leaving your furnace...are there 2 white pipes that go out the side of the house?
and also when the furnace is turned on...does the small motor that blows air out the plastic pipe come on?
and the exhaust fan...does it start up...sounds like a bathroom exhaust fan...
thank you. Can you remove the plastic pipe from the motor and look in? Or can you rotate the fan by hand at all?
we have a few choices...motor gets power but is stuck by a rodent, bird or nest.
motor does not get power = bad board
motor gets power and nothing is stuck = bad motor
usually it is because something crawled into the warm pipe....unfortunately you have to remove to find out. Is the unit still under warranty?
If you need anything else let me know....aso while the uit is coding 3...feel the exhaust motor...if it is warm/hot you likely have something stuck inside.
Just rate at top of page and I will take off active list for now