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Mend Heating Hot Water Boiler

My boiler kicks in when hot water and heating set to off position?

My boiler ignites every half hour for roughly 30 seconds and then goes off, even when DHW and DTG are set to off on the timer. Is this correct?

David
May 2011
Heating, Home Heating SystemsHeating Hot Water Boiler
sounds like moterised valve problem

mike
May 2011
what make and model is your boiler ?

john
May 2011

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Boiler Turning On When Off - Why?