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    moondog123's Avatar
    moondog123 Posts: 1, Reputation: 1
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    #1

    Nov 17, 2009, 03:13 PM
    York burners won't ignite mod P3HU 9 yrs. Old
    When t-stat calls for heat the combustion blower starts, the glow plug glows but gas valve doesn't open and burn doesn't ignite. The combustion blower continues to run. Is this a problem with the pressure switch? Does it need to be replaced? :confused:
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Nov 17, 2009, 03:15 PM

    If the ignitor is glowing then there is no probem with the pressure switch
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #3

    Nov 17, 2009, 03:15 PM
    Do you hear gas blowing in? Sounds like no gas, bad gas valve or bad control board
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
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    #4

    Nov 17, 2009, 06:02 PM

    Also, make sure you have gas present, make sure the burners are not rusted closed, if the burner in front of the ignitor is plugged the burners won't light.
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