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Mend Ferroli combi77ff Combi Boiler Water Pressure Central Heating

ferroli combi77ff losing water presure?

have changed ch presure safety relef valve but still no change i keep topping the system up the hot water runs fine and the central heating runs ok and if we keep the central heating on then the presure remains but once i turn the heating of for a while the presure drops can any one HELP A.S.A.P

Keith Hazelwood
December 2009

Ferroli Ferroli combi77ff Heating, Home Heating Systems Combi Boiler Water Pressure Central Heating

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Ferroli Combi 77FF: Losing Water Pressure - Help!