Search found 2 matches

Found the fix, knew it had to be something simple (usually is) as boiler was igniting and circulation pump was working.Balancing valve(red wheel handle) on the return had accidently gotten knocked ope ...

Hi all, I have an issue with my central heating system. My system has 2 zones (upstairs and downstairs) and works fine when either zone is selected on its own. The problem occurs when I set both zones ...