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boiler lock out no hot water?

saunier duval 30e. boiler locks out when hot tap is opened, if hot tap is opened while boiler is fired up for heating I then get hot water. thanks in advance for any help

paul
October 2008
Saunier DuvalHeating, Home Heating SystemsBoiler Lock Out Hot Water
sounds like diverter valve stuck in central heating position.

mark
October 2008

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