Concord 95% light blinking 3 times what are the possible causes to create the problem [Archive]

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goodcop047

Nov 29, 2009, 10:03 PM

I just installed a concord 80,000 95% furnace, now I am getting a blinking light 3 times, if I jump the pressure sensor wires it works fine what are my possible problems

KC13

Nov 30, 2009, 04:40 AM

Try BRIEFLY disconnecting the exhaust vent, see if unit will advance through operating sequence. If it does, vent is restricted or undersized. Check for trapped condensate in vent, correct pitch if necessary.