Noisy Copper Boiler

[BobbyTrigger]

I have a conventional heating system, with a (old looking) boiler in a cupboard downstairs, and a big copper tank up in the loft. Problem that i have is once the central heatings been on a few hours (so the systems been nice and hot for a while) the system starts to make crazy loud banging noises. the noises seem to be coming from the loft wich would suggest the copper boiler? as soon as the banging starts i turn the CH off via the timer by the boiler downstairs and the banging immedeatly stops.

this happens every time i use the central heating (providing i leave it on a few hours)

any ideas?

 

[JPC]

have you gone into the loft and had a look ?

 

[BobbyTrigger]

not when the system starts to bang no. you think i'll be able to see/tell anything for being up there?

 

[namsag]

Your boiler thermostat has gone, needs changing asap

 

[BobbyTrigger]

is that an expensive job?

 

[namsag]

All depends if you value a basic boiler repair expensive compared to system boiling over distorting tanks bringing ceilings down and possibly killing someone as happened recently.

Boiler stats are usually around 20 quid plus fitting

 

[BobbyTrigger]

lol - sounds affordable then!

thanks for the help fellas.