Wonder if @PigleJjohn is around or anyone with boiler knowhow. Have a combi, Worcester Bosch Greenstar I JuniorCurrently, coming up to ten, just running hot water because it’s summer. A few days ago, noticed a slow drip of fluid from base of the boiler at the side, running across to other side. Turned it off, after about two hours the leak stopped.
Called in boiler engineer, he said probably from torrential rain earlier in the week, he serviced it including pumping up the expansion vessel. Prior to this, pressure was level and stable, had some issues when the heating’s running, sometimes had to top it up, but not otherwise. A couple of hours after he left pressure dropped to zero. Topped it up but steadily dropping again, gone from around one to zero in about two hours.
Wondering if anyone has any idea what the issue might be?
Will call the engineer but have had issues in the past, one engineer took the boiler apart – literally - for service, claimed it was broken/unfixable but couldn’t say why, tried to sell me a new one. Got a second opinion, turned out he’d not serviced it properly. And after that it was fine. This is a new guy, seems trustworthy but worried he may have caused the problem.