High Pressue in Worcester CDI 350

[jimbro80]

Hi,
We have recently been having alot of power cuts. When the boiler(Worcester CDI 350) comes back on the pressure in the boiler goes vey high, sometimes past 4.
Does anyone have any idea why this would happen?
Thanks

 

[Agile]

More relevant is what is the pressure when cold!

Are you sure the filling loop is not leaking?

The expansion vessel is probably failed or needs recharging. See the FAQ thread.

Tony

 

[jimbro80]

Thanks for the reply.

No the loop isnt leaking. The normal pressure is between 0.5 an 1.5 when cold but previuosly it has dropped and needed refilling periodically but now it goes up when switched on.

Is the recharging a DIY job or is a Prof needed?

Thanks again.