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Afternoon all. Just returned form holiday and gloworm ultimate fails to fire. Has been off for 11 days. No pilot flame. Fan on top of boiler runs. (Went for this first after previous problems) I think solenoids both pick up. Spark igniter clicks continuously and is visible in window...

Hi Folks just woken up to a freezing house as boiler hasn't fired, I tracked it down to a sticking boiler fan - found it just rotating very slowly, anyway freed it up eventually and the boiler fired. question is can I replace the fan or does it come under gas safe and require a heating...

Just wanted to thank twgas & Groovejet. I changed the valve as it was the Micro switch. And for info the neons(thought they were LEDs) flash momentarily for power up and continuous for boiler firing. Thanks for the help. Ian

If I do the tests and it is indeed the 3 way v/v actuator micro switch that is faulty how can I jimmy the HW & CH so that I can have the heating without scalding the rest of the family due to high temp on the HW. need to keep turning the tank stat up to get the CH on.....or am I missing a trick...

Hello twgas It's a Siemens MA322C I have had trouble with this before. House builder snapped one of the fixing clips, didn't tell me & I didn't find this for ages so I have had it fastened up with tie-wraps. I changed the synch motor last year. Valve was making a right din this...

boiler now works ok for HW but still wont fire for CH. I swapped the output functions of the controller so that HW & CH were crossed (ie on the wrong channel outputs) so that I could prove the controller. CH buttoin caused the HW to fire up so that channel looks ok, however the HW button...

room stat is working ok. looking for wiring diagram for system to see where signal for boiler fire for CH is being lost. anyone got any ideas? thanks

Thanks for the info Groovejet. is the solenoid valve the item with the black lead/4 pin square plug on the end which is integral to the main gas v/v? Does it have two coils one for open & other for close? see attached photo also since i posted...... 1) I have managed to fire the boiler up...

Hi all Gloworm Ultimate pcb 900847 Pilot flame on boiler won't light. I have checked the two fuses on the pcb - both ok. When 240V switched on the two leds on pcb flash momentarily then go out and a relay on the pcb picks up. Relay stays in until 240V switched off. Question is...

Hi all (please ignore I double posted by mistake). Gloworm Ultimate pcb 105111 Pilot flame on boiler won't light. I have checked the two fuses on the pcb - both ok. When 240V switched on the two leds on pcb flash momentarily then go out and a relay on the pcb picks up. Relay stays in...