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    Slotso47's Avatar
    Slotso47 Posts: 1, Reputation: 1
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    #1

    Nov 24, 2013, 03:42 PM
    How do I cure the 3 red flash code on my York
    I have 3 red flash error code on my York, how do I cure this ?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Nov 24, 2013, 03:57 PM
    Pressure sensor switch related. Could be a bad switch, blocked vent, air intake or blocked air hose. Disconnect hose from plenum and make sure plenum and sensor holes are open. After cleaning out, turn off heater power for a couple of minutes and then restart.

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