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Hi all, I seem to have air in my system. pressure drops and started to happen after a diverter valve for UFH was replaced. Also getting banging noises, which die down after the temp setting on boiler turned down. Manual says for diagnostics : test programs will be started when POWER ON is...

Hi, I have an Ariston 27 ACO RFFI and it was installed into the house I have purchased. However, I do not have any of the corgi details, but what happens is this. On demand for HW or CH, the boiler comes on I can see the LCD displaying appropriate temp reading etc. but when it should ignite...