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Acquaintance says his furnace will not stay lit. No make/model, yet.

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  • Acquaintance says his furnace will not stay lit. No make/model, yet.

    Goodman Manufacturing Co Model # GHT045-3 Serial number: 0201635435, 45000BTU/HR

    John says the glow plug (hot surface ignitor?) will light up and ignite the gas for a few seconds, but then turns off.
    Every once in a great while it will continue working without a problem.

    Any ideas?
    Thank you.
    Last edited by Robert Gift; 12-05-2011, 12:23 AM. Reason: make/model
    I'd take an educated guess - but I'm unqualified.
    It ain't just soot, it's paydirt.
    "I swear, wherever Gift goes, argument follows." -Youtube comment

  • #2
    Re: Acquaintance says his furnace will not stay lit. No make/model, yet.

    There is most likely some type of flame sensor, that is not sensing the flame,
    Push sticks/blocks Save Fingers
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    PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

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    • #3
      Re: Acquaintance says his furnace will not stay lit. No make/model, yet.

      Sounds like a bad thermocouple. Could be a shorted wire to the thermocouple from the controller. Mouse gnawing on the wire maybe.

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      • #4
        Re: Acquaintance says his furnace will not stay lit. No make/model, yet.

        Thermocouple on a HSI furnace, that's funny

        Some HSI systems use the igniter for flame sensing, other use separate flame sensor probes.
        HSI igniters are cheap, just replace, typically if it registers over 50 ohms it's failing. Clean the flame sensor if you have one, also check all connections and ground screw terminals to make sure their clean and tight. Flame rectification requires good ground to prove, along with proper polarity of the 120 volts.

        Lastly it's a failing HSI module.

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        • #5
          Janitrol Goodman Manufacturing Co. Model # GHT045-3 Serial number: 0201635435

          45000BTU/HR
          John tried jiggling the wires. Still not working.

          Thank you.
          Last edited by Robert Gift; 12-03-2011, 04:11 PM.
          I'd take an educated guess - but I'm unqualified.
          It ain't just soot, it's paydirt.
          "I swear, wherever Gift goes, argument follows." -Youtube comment

          Comment


          • #6
            I tapped on the connection on the flame sensor probe.

            Noworking fine.
            Thank you.
            I'd take an educated guess - but I'm unqualified.
            It ain't just soot, it's paydirt.
            "I swear, wherever Gift goes, argument follows." -Youtube comment

            Comment


            • #7
              Re: I tapped on the connection on the flame sensor probe.

              steel wool to the flame sensor
              No, it's not rocket science, it's plumbing and unlike rocket science it requires a license.

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              • #8
                Re: Acquaintance says his furnace will not stay lit. No make/model, yet.

                sounds like flame sensor . get steel wool or sand paper to clean the tip .. most time that work .. some time yyou might just have to chane the sensor

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