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Mend Vaillant Combi Boiler

vaillant combi boiler?

i turn my therostat down to 5d at bed time and my heating comes on through night help me

cutchy
February 2010
VaillantHeating, Home Heating SystemsVaillant Combi Boiler
thanks for that you were right

cutchy
March 2010
It's probably the diverter valve is passing. This can happen if your boiler has a warm start feature for hot water.
Run your hot water tap and feel the flow pipe on your boiler. If this gets warm then the valve is passing.

M
February 2010
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