vailiant boiler keeps building up pressure

Joined
11 Feb 2009
Messages
2
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0
Location
Bristol
Country
United Kingdom
why does my boiler keep building up pressure and keeps going up the only way to keep down the pressure is to bleed the radiaters all the time
 
what is the make of the boiler on mine the label is located on the bottom of the burner
 
I would expect the filling valve has been left open or partially open!

Tony
 

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