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1.I disconnected filling loop - (no signs of water getting through). 2.I then Isolated cold Inlet then de-pressurised system to 1bar which was stable on stand by. 3.Turned on CH, pressure then raised to just over 3 bar before I switched CH off. 4.Pressure fell back down to...

glasgowgas - I wil try this 2moro and post back thanks for the help so far.

Sorry if its bits here and there. Firstly- PSV dripping, Pressure is at 2.5bar, Pressure goes to just under 4bar when CH on. I then pulled lever on PSV to lower pressure to 1bar. As soon as I stopped draining water the pressure started rising and stopped at about 2.7 bar...

I would like to just point out that the system pressure rises to and becomes stable at 2.7bar. don't know if this is relevant or not but how come if there is a fault the pressure doesn't keep rising but stops at the 2.7 bar?

"Might be a split diaphragm in your expansion vessel" How can I find out if its the expansion vessel? How do I prove its the problem or not? And if it wasnt the expansion vessel what else could it be?

I opened cover, the pressure was sittin at 2.5 bar then rised to just under 4 bar when CH was on. Therefore I downloaded manual and it tells to lower system pressure, pull on lever on head of safety valve to release water until required pressure. I followed this but as soon as I got the...

Its just a normal combi boiler. Yes the 15mm copper pipe from the pressure relief that goes to the outside of my building. Its a Vokera option boiler. It uses light system to tell when to top up pressure i think. not the best design! Do you think there will be a pressure gauge behind...

the overflow pipe drips constantly

Boiler seems to be working fine although Water is dripping from the overflow and causing a mess. I have turned the bleed screw on one of my radiator to try let air out and also checked that the top-up valve was not letting water through. Note: I couldn't find a pressure gauge on the...