viesmann condensing boiler

Joined
8 Mar 2010
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Location
Derbyshire
Country
United Kingdom
Hi gents my boiler is dropping pressure i can fill it back up to 1 bar and within 3 days its down to.5 is there any other reason other than a leak for this to happen also noticed when i filled it back up water dripping from the overflow pipe from the boiler. thanks
 
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PRV letting by or Expansion vessel at fault.
Water dripping from the overflow is PRV letting by.
Have both checked.
 

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