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Hi everyone, Thanks for the advice. I ran a test last night to try and isolate the problem, as follows; Pressurised System: I ensured the boiler pressure was at approximately 1 bar (which seems to be the maximum it will hold). Isolated Boiler: I turned off both of the red handled valves...

Note that on the boiler the two pipes to the right have an arrow pointing up and the two pipes to the left have an arrow pointing downwards. Example below...

Thanks for the suggestion! I have three valves under my boiler: two red and one blue. I believe these are the isolation valves for the flow and return. Just to confirm, to isolate the boiler, should I be turning all three of these valves (both red and the blue) to the "off" position?

Hi everyone, I'm hoping someone here can shed some light on a frustrating issue I'm having with my brand new Glow-Worm Compact LPG combi boiler. I had it installed in my small bungalow about two months ago, and for the first month, it worked like a charm. However, for the past month or so, I've...