York Diamond 90 Furnace


Old 01-05-11, 10:32 AM
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Join Date: Jan 2011
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York Diamond 90 Furnace

I have a York Diamond 90 furnace, which will only blow cold air, 4 flashes of red light on control board, what is my next step? I don't have an error code sheet, but from what I can gather 4 flashes means bad open limit switch. Where is the limit switch, how can I verify it is bad?
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Old 01-05-11, 04:07 PM
Join Date: Feb 2009
Location: pittsburgh pa
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ther could be more than 1 limit switch.try a serach and locate one for york furnaces.many tines there is one byt the burner assembly.i would change the air filter if you have not done it already.

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