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Grunfos booster pump issue

  • 30-01-2025 10:17PM
    #1
    Registered Users, Registered Users 2 Posts: 382 ✭✭


    Hi my grunfos booster pump is not working right on the hot water side it’s pulsing and no water pressure. Cutting in and out and very noisy . On cold water side it works perfect Any ideas?
    when power is isolated to pump water is flowing ok does not seem to be a blockage or air



Comments

  • Registered Users, Registered Users 2 Posts: 2,050 ✭✭✭whizbang


    Probably impellor. You can get them cheap enough.



  • Registered Users, Registered Users 2 Posts: 150 ✭✭hydrus21


    Has the hot water temperature being increased?

    High water temperature can cause cavitation around the pump impellor.



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