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New Combi System Noise

Discussion in 'Plumbing and Central Heating' started by markie76, 7 Jan 2007.

  1. markie76


    21 Feb 2005
    Thanks Received:
    United Kingdom

    Six months ago our flat was refurbished. The existing conventional ch sytem of cold water tank and hot water tank was replaced with a combi boiler, all new radiators with some trv fitted. However the existing pipework remains some of which goes into the concrete floor.

    The noise problems are;

    1. Gushing noise from radiators, one in particurlar is the worse - I think this is the first in the system.
    2. A general hum/noise coming from the pipes supplying the radiators when the ch is on.
    3. Radiators random produce a loud bang as if they have been hit with something. This usually occurs when the ch has been switched on. But there have been occassions the noise has occured with the system off and the radiator which has just banged is stone cold.
    4. When you switch on ch there is a ticking noise from some of the pipes for upto 5 minutes. We had none of these noises with our old system.

    Information you requested;
    1) boiler is - WorcesterBosch Greenstar HE R30 -Gas. Stelrad radiators.
    2) Symptoms described above.
    3) No other changes.
    4) When new boiler & radiators installed.
    5) Heating coming on, during heating on, radiator bangs with heating on or off.
    6) Engineers have been to release any trapped air and have also bled the radiators. The boiler has been checked and given the all clear.

    I have done some research and could my boiler pump setting be too high? If so can anyone tell me how to reduce its setting in this new boiler?

    Any help much appreciated.

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  3. Bowsh9


    30 Aug 2015
    Thanks Received:
    United Kingdom
    I have the same problem, any help?
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