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Pump noise

AndreiKalinkin Member Posts: 2
edited April 2021 in Domestic Hot Water
This week our pump started making weird noise like sad dove. Tried to bleed air, no hissing sound and water starts coming right away, but sound stops while bleeding.

edit: it makes sound only in 3rd "gear".
edit 2: after 15 min. or so 2nd "gear" also singing songs but way quieter

Many thanks ahead.


    EBEBRATT-Ed Member Posts: 14,476
    What type of pump? And how old? If it's multiple speed pump it must be a wet rotor pump. Those are water lubricated and can be damaged by dirt etc in the water
  • neilc
    neilc Member Posts: 2,501
    try 1st gear ?
    and post a picture of the circ
    known to beat dead horses
  • gennady
    gennady Member Posts: 839
    Probably broken internal flow check.
  • AndreiKalinkin
    AndreiKalinkin Member Posts: 2
    Thanks guys for your thoughts. It seems there is a lot of dirt in the system. We bought the accumulation tanks used. Will keep cleaning the filters and we have spare pumps luckily