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    Ideal Istor HE260 HE325 Loud Bang + More

    Hello I have the same problem with my Ideal Istor (Eyesore) HE boiler. The diverter valve bangs when it is in central heating mode but in hot water mode, it is fine. It often shuts down too and then starts up again when it is in banging mode. The boiler is 3 years old. 6 months ago, I had...
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