Recent content by JohnZ

It starts to leak clear water when both hot water and central heating are running. I opened the sump cover, there was a puddle in there. I thought the condensation s-trap might be clogged. So I clear that out. It was fine for one night and the next morning, it started to leak again. Any...

Long story short, I traced down to this zone valve problem. It is stuck open, which signals both circulation pump and boiler to run. The weird thing is when I took off the head (the actuator and spindle part), I can't even manually rotate (clockwise) the valve back to close. If I rotate it...