Noisy Pump

[Ref]

Hi All,

My daughter has a noisy heating circulation pump. When running on 2 which is where it has always been it has recently become noisy with slight vibration in the pipe above and below when on 3 even noisier when on 1 it is almost normal. Is the pump on the way out or maybe needs removing and cleaning?

Many Thanks

 

[muggles]

Could be muck in the pump, it'll need dismantling to check

 

[adypeach]

Sounds like the inner rotor can assembly bearing is wearing, its either stick with the noise or replace. Bearings wear over time, or if the wrong speed is selected, very important that the pump is running on design curve. Running on incorrect speed can cause premature failure.