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Just to update I noticed the green "override" light flashing again last night, so I pressed the button and hey presto! The heating started working again! But now it just seems to be on all the time, I have tried changing the settings on the thermostat but it doesn't seem to make any...

Hi guys! I recently checked my Greenstar 24i as there was a very strange noise at the back of the house, and I found that the pressure indicator was basically at zero. I found a guide on here that showed me how to re-pressurize it, everything seemed fine for 3 or 4 days after. But now I...