I have a Glow Worm Ultimate 60FF, the hot water system is not heating the water however the central heating works fine. I have made comparisons and between the central heating and the hot water systems at various points and the Honeywell control unit appears to be working fine, passing the "call for hot water" signal (as is the heating) but it does not light the boiler. Just wanted to see if any one had a clue before I buy a new boiler control panel.

John Kroon, June 2009

external fault on control system,
not a fault on bloier

Andy, August 2009

sounds more like a motorised valve fault to me,

q, June 2009