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Mend Wickes Combi 102 Pressure Boiler

Wickes Combi 102 pressure?

My Wickes boiler needs a repalcement pressure valve. My concern is why has the pressure increased. Can it be that the hard water in this are has clogged the Main Heat exchanger. How hard is it to dismantle and clean out with descaler.

Alan T
February 2009

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