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  • Payne Heater Problem

    Have a 16 year old Payne forced air heater, model 373 LAV 048115. So far, to keep it running the last couple of years I have replaced replaced the circuit board, inducer motor, igniter, pressure switch, and two limit switches. This year the heater inducer fan would run and then nothing else. Ran in test mode and everything tested correctly, but afterwards there was an error code 31. Hit some of the limit reset buttons and now only the fan comes on and I am unable to run the component test again. The error code is 33 and changes to 13 after three minutes.

  • #2
    Different codes signal different things.
    A steadily lit LED indicates the furnace is operating under normal parameters.
    A number of short flashes represents the first digit of a two digit fault code.
    A number of long flashes indicate the second digit of a two digit fault code.
    Example: one short flash followed by two long flashes indicates Fault Code 12.
    A breakdown of in-house codes Click image for larger version

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    #12 indicates a power interruption of some sort occurred. Ensure the blower runs for 90 seconds prior to allowing the unit to run a normal heat cycle.
    #13 or #33 indicates a limit switch lockout. Check the air filter as it may be dirty. If it looks fine, the air return or supply grilles may be blocked by debris. Locate and remove it.
    #14 or #34 indicates an ignition fault or lockout, which means there is an issue with the gas supply. The control switch on the gas valve is probably on, and the supply shutoff valve might also be stuck in the open position.
    #24 indicates the violet colored fuse. If a fuse is blown, there may be a short in the 24 Volt wiring.
    #31 indicates the pressure switch is open. This might be caused by high winds or a vent restriction.
    Payne furnace codes 21, 22, and 23 require a service technician’s know-how. Contact your local dealer for assistance.
    If you ever feel uncomfortable or question remedying an error code, it is best to contact your local dealer for some extra assistance. Always remember to call for help is you detect the smell of gas while working on your unit.

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    • #3
      Payne Heater Problem

      Heater has now been functioning correctly since last November. I found the exhaust vent limit switch stuck in the off position and could not find any other problems. Thanks for the information.

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