Very Noisy Central Heating System

[AngelaB]

My problem is that when my gas central heating kicks in there is a very loud banging for up to 5 minutes. Once the system has warmed up the banging stops. This happens when it comes on via the timer or when the temperature drops and the system starts the heating process.

Could this be a boiler problem (it is quite old), or something else? I have bled all the radiators twice.

 

[masona]

The lads will want to know what boiler you've have? Where about are you hearing the banging noise?

 

[AngelaB]

The boiler is a Myson Apollo. The banging is very loud (it sounds like someone hitting the pipes with a hammer), but loudest in the boiler & the pipes above it which go to the airing cupboard.

Thanks for the speedy reply.

 

[oilman]

How old is the boiler?

 

[AngelaB]

Apologies for double post

 

[AngelaB]

It's about 14 years old but has always been maintained.

 

[oilman]

You could try some boiler silencing chemical to start with. This will take a couple of weeks to work. The system may need flushing before next winter.

 

[AngelaB]

Thanks oilman for the help and speedy reply. I will try what you advised and report back with the result. Thanks again

 

[bradleybear]

This is definitely a pump problem. Change your pump first.

 

[oilman]

Hi bradleybear, could you explain the mechanism for the pump to operate like this?