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my sme super90 combi boiler,heating and water stays on even when i have tur?

i turn off the heating
GL4771901 my water and heating stays on after i have switched off the heating and water,lease help
rashad kamal, July 2008
either you programmer has developed a fault, or more likely you have a faulty zone valve that is still providing the boiler with demand

T, July 2008