Worcester Bosch Persistent Pressure Loss

[andyguyuk]

Hi everyone,

I am looking for some help.

I have a Worcester Bosch 30CDI combi boiler which has persistent pressure loss. I have checked all pipework for leaks and found none. I have replaced any joints which looked like possible leaks and applied fernox leak sealer to the system. But, I have still got the continued pressure loss.

I have pressurised the system cold to 1 bar, the pressure rises to about 2.5 bar when operating. It then falls back and loses around half a bar a day. I have put a polythene bag around the pressure release valve pipe and there is no water leaking there.

Could there be a problem with the heat exchanger leaking?

Thanks in advance for your help,

Andy

 

[cross thread]

yes if leaking it will go via the condensate pipe