Glow Worm 50 ff dead

[flinty]

Hi all,
I have a Glow Worm 50 ff boiler.
I was going to replace the actuator on the three port valve on Monday as that went faulty the other day, but last night a new fault appeared.
The boiler now does not light at all.
I have checked the main fuse and also the internal fuse in the boiler control panel. Both seem ok.
There is no internal LED light showing which to me suggests there is no power to the boiler.
If it isn't either the internal or main supply fuse what other possible fault could it be?
All help greatly appreciated.

 

[gas4you]

Check the incoming mains on the boiler at the ionitial terminal block. I think this model has permanent live and switched live. If power present at permanent live and switched live when timer is on and stats calling for heat then boiler fault. If no voltage present then check fuse/breaker at consumer unit, may be a separate heating mcb or on immersion. If good then points to fault in external controls or zone valve as you originally suspected