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    kbowman's Avatar
    kbowman Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 3, 2008, 09:20 AM
    Nordyne heater
    Indicator Light blinking twice shows pressure switch is open will not allow blower or heat to work.
    therinnaiguy's Avatar
    therinnaiguy Posts: 153, Reputation: 5
    Junior Member
    		  
    #2

    Jan 3, 2008, 09:52 AM
    Test the pressure switch with a Ohm meter to see if it is making contact. Make sure any condensate hoses are free of moisture and/or debris. Check for a blockage in your venting system.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jan 3, 2008, 09:52 AM
    Turn off power. Pull vinyl hose off pressure switch and make sure it is clear of debris/water. Turn on power. Try again.
    lalitak's Avatar
    lalitak Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Oct 5, 2013, 05:09 PM
    Lennox heater blinking all ones but four of them.. or maybe 1222? Blows cold airwhen heater is on.
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