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Laars Neotherm 80,000 BTU gas boiler-loud humming noise after prepurge on startup.Hum goes away after 15-20 seconds.Humming only happens when the temp outside is very cold.

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Is it the gas meter outside making a noise on a cold day .

Posted on Dec 17, 2016

Testimonial: "Gas meter is quiet and the hum noise is emanating from the gas valve / venturi unit. Thanx for your rely"

  • 2 more comments 
  • paulcarew Dec 18, 2016

    Do you mean the burner is humming ? If so you could clean them out with air line or shop vac ,

  • Anonymous Dec 18, 2016

    Gas valve/venturi is humming Possible adjustment

  • paulcarew Dec 18, 2016

    Not sure on what you are calling gas valve venturi

  • Anonymous Dec 18, 2016

    http://bostonheatingsupply.com/RV2017900...
    follow this link thanx again.

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