We originally had intermittent hot water but still had heating,but now we have neither. we had the same problem couple months ago the engineer said we needed the diaphram replacing which he did and it has worked fine untill the last couple of weeks. he now thinks the pcb board has gone do you have any suggestions?

kevin lewis, July 2008

Probably is the pcb as they are prone to being faulty.

Charisma heating, July 2008