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  1. N

    Boiler won't fire up when heating activated but does with hot water.

    I have a worcester greenstar camray utility 12/18 oil boiler paired with Potterton EP2 programmer. When heating is activated the boiler won't fire up but does fire up when hot water is activated. I have got around this problem by locking open the honeywell motorized valve so as when the hot...

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