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Thread: Gas heat york

  1. #1
    I have 4 yrs in the trade and I've got a stumper.

    York model#p-hed12n04001a serial# eeapo11342
    horizontal gas furnace

    It has an intermittent pilot problem and locks itself out. The pilot light flame flickers the majority of the time like your trying to blow it out and then will suddenly stand normal and all systems are go!(main lights).

    I have checked the following :
    orifice is clear
    sensor probe has been lightly sanded
    24v at pv to comm
    ignitor sparks at all times during trial
    7 in w.c. to pilot tube
    no obstructions in flue piping
    draft motor is working correctly and in the right direction

    I have installed new gas valve sensor wire and ignition module and I am getting the same results please help me with this nightmare! thanks

    [Edited by svc on 04-05-2005 at 09:58 PM]

  2. #2
    Join Date
    Dec 2004
    Location
    Robards KY
    Posts
    269
    Have you inspected the heat exchanger for cracks? Do you really have 24v@ the sensor -sounds excessive. do you mean something like 2.4 microamps.

  3. #3
    I have 24 volts at pilot valve to common. There are no cracks in the heat exchanger. I have replaced the sensor cable and ignition module. If I have 24 volts to my pilot on my gas valve (7 inches of W.C) and a good spark shouldn't I have a good pilot flame?

  4. #4
    Join Date
    Dec 2004
    Location
    Robards KY
    Posts
    269
    If you have a honeywell control, try adding a grounwire from the pilot assembly to thr ground terminal on the board.

  5. #5
    Join Date
    Mar 2005
    Location
    Columbia, SC
    Posts
    36
    Does the pilot go out after an offcycle, and it will ignite when you do it yourself and several times after, reason being that I have ran into some cases, where a small crack or bad seal has developed and it is just enought to make the pilot not light or have problems lighting, when the furnace does light the metal expands and seals the bad joint, after the metal contracts the problem happens again.

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