Recent content by graham.

Don't think its the diaphram, as the DHW micro-switch is being operated every time, even when the DHW flows cold.Wondered if it could be a faulty K1 relay? On the wiring diagram in CH mode this relay is bypassed.

My problem is with the hot water side of the boiler,it only works intermittently.But when the central heating is on it works ok.When the dhw is turned on by itself there it doesn't always spark. Grateful for any help.