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Noises coming from the central heating pump which appears to be running very hot and no heat to radiators

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Your bearings or impeller are shot. You will need to rebuild or replace the pump

Posted on Oct 07, 2008


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try opening the bleeders on your radiators,one at a time starting at the one closest to the pump until all air has been expelled then close bleeder and move on to the radiator next furthest from the pump and so on.if hot water doesn't come out from the first radiator within a short time, or if you cannot hear air being forced out thru bleeder you prolly have a defective pump; have it checked/replaced by a reputable guess is that the "buzzing noise" is because the pump is defective and the electricity has no place to easy preliminary check for this is to feel the pump motor while buzzing to see if it is hot, if ti is it prolly is bad

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