Grundfos Circulator Pump Noise

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Nick B, Apr 20, 2018.

  1. Nick B

    Nick B New Member

    Apr 20, 2018
    Hyde Park, NY
    This is my first post, so please be gentle...

    A few days ago I noticed a noise at night when the house was quiet, I finally found it today and it is the circulator pump on my boiler.

    It sounds like a fast chirping. The noise is intermittent, even when the boiler is running. Pitch and frequency change when I adjust the speed setting on the pump. The pump was installed about 2 1/2 years ago, which means that it's probably just a few months out of warranty of course.

    If anyone knows what this noise is, can it just be fixed by doing system adjustments, or should I replace the pump? The heat is working fine, but I've learned that random noises should be dealt with.

    It is a Grundfos UPS15-58FC
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