Came out to the pump on the boiler making a weird noise.
Boiler water pump noise.
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Recirculating hot water pump noises duration.
Check the circulation pump.
If the noises continue after you have taken the previous actions there is a possibility that the problem may lie in the circulation pump.
If the humming stops and you want to keep the pump set at a lower speed just check that the radiators heat up properly and the boiler isn t cycling too fast.
Otherwise you re likely to find it in the airing cupboard or under the stairs.
If the pump isn t already set to the lowest speed push the dial all the way to the left and wait to see if the humming noise stops.
If the well pump is a submersible unit located inside the well normally the only noise you ll observe in the building is the clicking of the pump control relay s that turn the pump on or off and possibly a modest sound of water entering the water pressure tank or building piping.
In most cases the noise will be caused by this pump operating at an excessive speed.
Why a central heating pump might be noisy.