I ancountered a new problem with my Brittony 80 combi boiler.
The other day, I topped up the pressure in the central heating cirquit (to about the maker's recommended 2-bar) and then switched th boiler back on. I happenned to notice that the pressure guage then rose to about 3 bar, so I relieved the pressure via the pressure relief valve.
Then sometheing odd started happening. The relief valve, which is supposed to hold pressure up to 3-bar, started blowing out water at anything above 2 bar. I took the relief valve apart and looked inside. All seemed in order, but when I reinstalled it, the problem continued.
Suspecting a fault in the relief valve (tired spring perhaps), I bought a replacement today. I installed the replacement, and found that the new valve behaves exactly the same as the old one, blowing at
2-bar instead of 3-bar.Logic tells me (but tell me if you disagree) that the most likely diagnosis is that the pressure guage is no longer giving a correct reading. But if that's the case, it seems strange that the fault in the pressure guage would happen immediately after I released the system pressure via the relief valve yesterday, don't you think?
I guess the fault could be in the actual pressure guage dial or on the pressure sensor from which it takes its unput. What do you think?
Thanks...
Dave L