Boiler pressure up and down heating cuts out

[lloydml]

I have an Alpha 37 Boiler and its losing pressure. When the system is low the boiler cuts out. When I introduce some water to the system the boiler starts then the pressure is rising so that the guage is at the top.

This was happening once week initially but is now starting to happen several times a day.

 

[gas4you]

Is this an HE version?

Is it still under warranty?

See FAQ's on how to check the expansion vessel.

 

[lloydml]

Its not the HE version the warranty has expired now I guess. It was fitted new to my house by a property developer just before I moved in three years ago. It is currently running at 2.7 bar the needle is in the red area. I'll check the FAQs. Are these on the Alpha website?

 

[gas4you]

No. On the plumbing home page on here