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salamander pump-turning on and off rapidly when in use

Discussion in 'Plumbing and Central Heating' started by ADONAI, 25 May 2021.

  1. ADONAI

    ADONAI

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    Hi
    in the last week the pump is turning on and off rapidly when first used in the morning to provide hot water to the shower .
    after about 10 minutes its then ok.

    Any ideas ?

    Thanks

    A.
     
  2. Jajodu

    Jajodu

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    Sticky flow switch maybe.
     
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  4. SalamanderPumps

    SalamanderPumps

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    Morning... Sounds like your pump is "hunting" - this occurs when a universal pump is installed in a system with a leak. When the pump recognises a pressure drop, caused by the leak, it will activate. You can carry out an isolation test on the pump to determine if a leak is causing the pump to turn on and off. Switch off the water supply from the pump using the isolation valves on the outlet anti-vibration couplers (hoses) attached to the pump. The diagram below should help:

    [​IMG]

    Then leave the pump overnight. If the pump doesn't start overnight then you probably have a leak in the system which is causing the pump to kick in.
     
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  5. ADONAI

    ADONAI

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    Thanks Salamander but how can that explain it then switching off ? .i can see why that would explain it switching on when you are not using it.
    But its switching off whilst the shower is still running.then it comes on again.

    A.
     
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  7. SalamanderPumps

    SalamanderPumps

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    If you can give us a call on 0191 516 2002, with your serial number, a member of our Technical Team can run through some tests to get to the bottom this.
     
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