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Getting a FL4 service code. hot service igniter problem. cannot get heater to ignite.

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Follow the two wires with inline fuses in them down to below the burner tray. The ignitor is at the end. Is it damaged or missing the metal tip? Check the fuses as well. You will likely find the fuses blown and the ignitor damaged. Replace both and you should be back to heated water in no time.

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Posted on Sep 12, 2010

  • grant Jul 27, 2012

    Hi John,

  • grant Jul 27, 2012

    hI john same problem here. I have no fuses on the the two white ignitor lines though. does it matter which side I attach them on to the main circuit board? I have already smoked on conversion plug and i think it happened because they were in revers?? No "clicking' sound for the gas valve to open and No gas flowing..Ignitor glows bright red and then FL4 code. 220 VAC hooked up.. any thoughts? thanks grant



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I have the FL4 error code. Replaced igniter and checked the fuses. Still doesn't light

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I have a handy lite2 LJ175N and I keep getting FL4 error code but the hot surface ignitor works if I run power to it from an outlet.

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So, you replaced part R367100 (Igniter)? This part if very susceptible to failure if touched. I would inspect and/or run a continuity check to make sure it has non cracks. Does it glow red when you attempt to start the heater? Remember, that is the how it ignites the flame, by getting red hot.

If it glows red hot, but does not light then I'd do the following testing in between;

Check that the inline fuses on the igniter aren't blown,

Check if the control board is sending a charge,

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