New boiler. Hot water fine. CH nightmare. Has only worked to programme request 8 times in month plus (4 days). Engineer has changed programmer twice, diverter, hot water and ano valve twice, called in Worcester who said electrical or possible blockage (as running out of ideas). Then electrician...
Recently we unscrewed the shallow rose to clean the trap. It was screwed back and a leak developed!!!
This is a new installation.
I have looked at it and it appears to be (partially?) sealed with silicon, but have no idea if a locking nut was supplied ? It doesn't look as though it was and...