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My ideal ISAR m30100. Started making a bang when lighting. It has had a spark ignition installed over 2 months. It has started banging again two weeks ago, though in the last week not so much. It does it when hot water only on or when both hot water and central heating on together. Another...

My Ideal isar combi boiler is coming up to 5 years old. It has starting making a banging noise after the hotwater has been running for about 1 minute. The bang is extremely loud and frightening. It does not do this all the time. We have bled all the radiators and this has seemed to solve the...