vokera boiler pressure problem

[ally73]

my vokera sabre combi boiler has ahigh pressure problem. i have disconnected the water filling loop pipe but still the water pressure goes up. can anyone help me. thanks.

 

[AndersonC]

In my vokera manual there is a sentence which describes how to manually open the PRV (using a small lever I think)

 

[kevplumb]

hope it also describes how to replace it after it starts leaking

much easier to bleed a rad into a bucket

 

[ally73]

i can release the pressure when it rises but this is not curing the problem. any ideas?? thanks

 

[kevplumb]

usually the domestic heat exchanger is holed and the mains water is getting to the heating side

isolate the cold feed to the boiler then leave a hot tap open

if the pressure in the heating drops then you have found the prob

 

[ally73]

thanks kev will try that now. will let you know.