Gas boiler

I have a Potterton Boiler, non-condersing, installed by corgi fitter about 5 years ago. Recently, yesterday and today, it has been sending out noises, such as 'bangs' and now 'cracks' (like a kids top cap pistol) Corgi gasman has taken it apart and can find no definite reason for these noises. The fault-finding manual gives masses of meaning of different lights and their phasing, but nothing regarding noises.
Any thoughts - no sign of flash or burns on connections
Colin
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On 19/10/2012 11:38, cojack wrote:

Yes. You should try uk.d-i-y.
Meantime... it could be kettling (local boiling) implying a clogged heat exchanger or a pump fault.
Andy
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Thanks Andy, been away for a few days and now following it up
Colin
"Andy Champ" wrote in message
On 19/10/2012 11:38, cojack wrote:

Yes. You should try uk.d-i-y.
Meantime... it could be kettling (local boiling) implying a clogged heat exchanger or a pump fault.
Andy
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