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why is my vaillant combi firing on and off when the tap water in on?

when the hot water is on the boiler keeps firing on and off

dave
July 2010
VaillantHeating, Home Heating SystemsVaillant Tap Water Hot Boiler
Model?
There are many different answers dependant

Carefree
July 2010
can you be more specific dave ?

ged
July 2010

Automatic Answer

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Click here for Vaillant Tap Water Hot Boiler

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