biasi 24s

[mikplumb]

hello.
biasi 24s combi. pressure guage rise even when heating turned off. fill loop isnt passing. P R V working ie dripping. Would this be the domestic heat exchanger ? Is it a pain in butt job? more experienced answers would be appreciated. I'm new to this repairing boiler thing but have to start somewhere. thank you

Mike

 

[glasgowgas]

isolate and disconnect filling loop, observe pressure

if its rising, isolate cold feed to combi

if its rising, dhw plate hex passing,pin holed,goosed

 

[mikplumb]

isolate and disconnect filling loop, observe pressure

if its rising, isolate cold feed to combi

if its rising, dhw plate hex passing,pin holed,goosed

thanx mate. ordered plate exchanger hope it does the trick