Banging noise in boiler when hot water comes on

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Banging noise in boiler when hot water comes on

Postby ajr0987 » Mon Aug 07, 2017 12:37 pm

Hi,

We have recently moved and the property has a Halstead Balmoral 45f boiler. We had it serviced before we exchanged contracts in June and our report states there is nothing wrong with it despite it being about 30 years old (has had some new parts fitted). In the last 2 weeks, we have been woken up about 5 times now by an almighty banging noise as the hot water comes on (on timer), however it does not happen every day. After a minute or two, the noise stops and the whole time we use hot water, it does not come back.

I recorded the noise and have uploaded to YouTube here: https://youtu.be/eq_0U8-BT5w

Does anyone have any idea what this could be?

Thanks
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Banging noise in boiler when hot water comes on

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Re: Banging noise in boiler when hot water comes on

Postby kfordgas » Mon Aug 07, 2017 1:03 pm

Hello and a warm welcome to the forum
The boiler is 'kettling' due to its age. This could be due to a number of reasons, system design, poor water condition inside the boiler, poor pump performance. It is not dangerous, but your best bet is to invest in a new boiler on better running costs and parts availability.
Thanks
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Re: Banging noise in boiler when hot water comes on

Postby ajr0987 » Mon Aug 07, 2017 1:49 pm

Hi, thanks for getting back to me - very helpful. Is this something that you think could be fixed (and cheaply) or is a new boiler the only realistic option? We were thinking of changing it in the next year or two but were hoping we wouldn't have to this soon (only been in the house 4 weeks!). Thanks
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Re: Banging noise in boiler when hot water comes on

Postby kfordgas » Mon Aug 07, 2017 2:55 pm

You can try some fernox silencer added to the system. As mentioned it's not dangerous, so could be left a while until the noise is unbearable.
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