Sealed system overpressurising.

[littlebloke]

Hi
I have a sealed condensing system with a brand new boiler.
The central heating pressure gradually increases, venting from the pressure relief valve. There is no air in the system, but the pressure rises continually. To avoid water soaking the outside wall, I have resorted to bleeding excess water from my bathroom radiator every day. There are two ball valves feeding the expansion vessel. I cannot believe both of these are letting by. I suspect the expansion vessel is at fault here.
Can anybody confirm this is the case.

Many thanks in advance:smile5:

Steve.

 

[lame plumber]

getting in your installer should resolve the problem, call them back asap,

 

[Chalked]

It's brand new! Phone your installer.

 

[Simon F]

welcome to the forum.

The only safe advice has been given.

If the boiler is as you say brand new,
why would you be trying to diagnose the problem yourself?
if it has been legally fitted by a gas safe firm, it will also be registered and there will be a manufacturers guarantee.

try to see how your question only raises more questions/concerns.

 

[Dotty]

As previously said, get back the GSR who fitted it.