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home Fix label Heating label_important Home Heating Systems

My Keston C40 will only heat up the central heating water if the hot water ?

My Keston C40 will only heat up the central heating water if the hot water is on as well. Can you help me with where the fault lies?
Andy Armstrong, March 2010
home Fix label Heating label_important Home Heating Systemsdone
is your system is a y plan with a 3 port valve ?
or s plan with 2 x 2 port valves

hi-spec plumbing & heating (essex), March 2010

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