Thanks for the tip about dribbling valves - not something I would have ever thought of Tony.
Bowl and umbrella in hand (and torch in teeth!) I went for it and after an initial spurt I guess the pressure was great enough to trip the valve and it's now at 0.8Bar. And to top it all I have huge...
I have a degree in engineering but can't for the life of me work out what's going wrong with my Glowworm 24CI Boiler.
It's got a low pressure light, 0.6Bar and has consequently switched off. I have read similar forum responses and downloaded the user manual...