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Discuss Water cylinder pump problem in the Plumbing Forum area at

  1. gudu

    gudu New Member


    The pump from my hot water cylinder has started making the noise it makes when running on and off continually, even when no taps are running.

    I left it for hours but it's still doing it. Turning it off and on again at the wall also hasn't helped.

    I've uploaded a video showing the problem:

    Does anyone have any ideas what the problem may be , please?
  2. Daniel Hall

    Daniel Hall New Member

    Is it running dry? I can't really hear it on the video
  3. gudu

    gudu New Member

    I'm not sure what you mean, I'm afraid.

    The pump still works fine when taps are used but when no taps are on then it makes the constant on/off noise on the video.
  4. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Is there anything running in the vid (only ask as I can hear water running ??)
    • Dislike Dislike x 1
  5. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    As above. Only takes a small trickle on some pumps for the pump to come on and off. Or a stuck flow sensor maybe.
  6. gudu

    gudu New Member

    The dripping is the cold water storage tank filling up. I'll have another look for any leaks any where.
  7. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Your pump may just be cream crackered
  8. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Unless you have just run some water shouldn't be dripping

    Could be a leak somewhere
  9. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Had not thought of that. . #itmustbelate.
  10. jtsplumbing

    jtsplumbing Plumber GSR

    Got any dripping taps ? something like a small drip can be enough to kick in the flow sensor, or sensor is faulty, worse case new pump, is it only supplying hot water ?
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