Humming Sound from Boiler Electrical Component

Discussion in 'Electrical Forum discussion & Blog' started by GregoryR, May 29, 2012.

  1. GregoryR

    GregoryR New Member

    Messages:
    21
    Location:
    Maine, USA
    Hello,

    As far as I can remember, this piece has been the cause of a humming noise. Any ideas on what this does and if I could easily replace it?

    Thanks!

    Gregory IMG_20120529_211511.jpg
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    It is the transformer for the low voltage controls. Need to find the specs, might be printed on the other side somewhere. Most likely, it is 24 VAC output rated 40 volt/amps. Any electric supply or heating supplier will have it. Do not subsitute a "doorbell " transformer from the hardware store.
  3. ActionDave

    ActionDave Electrician

    Messages:
    346
    Location:
    Colorado
    All transformers make that humming noise. A new one is not guaranteed to be any quieter.
  4. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,134
    Location:
    Houston, TX
    Especial when mounted on a plate like that.

    Normal operation for the way it is installed, I think.
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