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Weil-Mclain Aqua Balance - Loud Vibration/Shuddering

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Perk67
Perk67 Member Posts: 3
edited January 2023 in Gas Heating
Hi, I have a WMB-155C, that was installed 4 years ago. It has been maintained each year by the installer as per requirements. This year it has started to make a really loud noise such as vibration. The vibration is quite deep that we hear it in the first floor. I observed it the other day and it looked like it was coming from the part labelled as 640-000-082, which is where the air is sucked in. I had the blower replaced (a separate part, 640-000-081), as the tech though that was the issue. Looking at the parts diagram for this unit i think its either the Gas Valve #640-000-037, or the LG to NG conversion kit 640-000-082. Here is the link to the parts diagram. https://parts.weil-mclain.com/catalog?model_id=43&schematic_id=59

The vibration seems to be getting more violent the colder it gets outside. Im concerned this thing will shake itself to bits and cause either a water or gas leak. The gasket on the back of the heat exchanger is already leaking, which they said they will replace.

Thank you!

Comments

  • Ironman
    Ironman Member Posts: 7,377
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    Unlikely that it’s the gas valve and it’s definitely not the LP orifice.

    Was a combustion analysis done?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,605
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    Can't just throw the parts cannon at it and expect success. Someone has to troubleshoot check gas pressure, combustion test and make sure the flue and intake are installed correctly.
    Ironman
  • Perk67
    Perk67 Member Posts: 3
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    Here is a link to a video of the issue. You can see the noise/vibration coming from the NG/Air Mix Orifice. Not sure what's causing it to do this. https://youtube.com/shorts/VzM48jfDlQg
  • Ironman
    Ironman Member Posts: 7,377
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    If a person has pain in their feet, you don’t cut their toes off and sew on other ones, you find the cause and treat that.

    Instruments and a competent tech need to be there to diagnose what’s wrong.

    Again, was a combustion analysis ever done?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Perk67
    Perk67 Member Posts: 3
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    Sorry for the delayed response. Anyway, after review of the pictures I sent in showing the leaking heat exchanger and the venturi making all that noise, the manufacturer is going to replace the entire boiler under warranty.
    Ironman