Combi boiler loosing pressure

[valandian]

Hi there,
I have a worcester bosch combi which keeps loosing pressure.
I have looked around & there are no obvious leaks anywhere.

From what I have looked @ on the net & asked, everything seems to point to a leak though.

Here is the weird bit though, it can be fine for months & then suddenly just drop & then it can be dropping on a weekly or even daily basis only to be fine again for months.
Could there be any other reason for this happening?
I'm thinking, what if the pressure from the main fluctuates ?
Could this the reason.

Any help and advice would be much appreciated.

thanks

Ian

 

[Agile]

You dont bother to tell us which model.

The FAQ should tell you how to find small leaks.

If there really is no leak in the system then it may be the AAV which is inside the combustion chamber. However this should only be opened by a competent CORGI.

Tony