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Mend Heating Hot Water Boiler

Boiler problems?

When i switch on my hot water the heating comes on at the same time. Is there anything i can do to stop it?

P
March 2009
Heating, Home Heating SystemsHeating Hot Water Boiler
what boiler you got combi or system??

boiler bill
March 2009
try turning roomstat down first...

t
March 2009
yep replace the 3 port valve

j
March 2009

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Boiler On When Hot Water Is On - Fix?