1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Whistling unvented heater

Discussion in 'Plumbing and Central Heating' started by RobbiS, 14 Aug 2020.

  1. RobbiS

    RobbiS

    Joined:
    14 Aug 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi there,

    Recently had engineer out to our 11 year old Oso direct immersion water heater as it was slow dripping through tundish. He drained and refilled/reinstated internal air gap and no dripping now, however, when turned on it immediately starts making a slight whistling/squeal type noise.

    I don't recall that it was doing this prior to his visit, though I can't be 100% sure (only really noticed as he said to keep an eye out for any further drips in case the valve needed replacing!).

    It's not particularly load or bothersome, but is it something that needs looking at? Don't really know what's normal and what isn't in terms of immersion noise!

    Thanks in advance
     
  2. Sponsored Links
  3. muggles

    muggles

    Joined:
    28 Oct 2005
    Messages:
    13,330
    Thanks Received:
    3,072
    Location:
    Daventry
    Country:
    United Kingdom
    What do you mean by "when turned on"? Are you talking about the immersion heater? If so then they aren't completely silent, although loud noise could indicate a build-up of scale and imminent failure
     
  4. dilalio

    dilalio

    Joined:
    20 Mar 2009
    Messages:
    7,901
    Thanks Received:
    1,281
    Location:
    Potters Bar
    Country:
    United Kingdom
    Liken the sound to your kettle during the early and mid stages of a boil.
     
  5. RobbiS

    RobbiS

    Joined:
    14 Aug 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    Yes, sorry. It's when the immersion comes on. Maybe it is just on its way out.
     
  6. RobbiS

    RobbiS

    Joined:
    14 Aug 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    Suppose it does sound like a kettle first being turned on, which makes sense the more I think about it as suppose the heater is just a giant kettle that (hopefully) doesn't boil. Maybe I just never noticed it before as I wasn't really paying attention to the heater until now.
     
  7. JohnD

    JohnD

    Joined:
    15 Nov 2005
    Messages:
    74,139
    Thanks Received:
    4,282
    Location:
    Crossgates, Europe
    Country:
    Cook Islands
    they get noisier in hard water areas as limescale builds up. The noise does not mean it is about to go wrong. They often last many years.

    the heating element is a replaceable part, not expensive, but will need a plumber to fit, qualified to work on unvented cylinders.
     
    • Thanks Thanks x 1
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
  9. Sponsored Links
Loading...

Share This Page