Glow worm 30CXI F1 fault code

[Kewat66]

Hi All,
Attended a breakdown today on Glowworm 30CXI. Boiler started to go through the start up sequence, when igniting I was getting a spark for 1 second or so then boiler went into lockout and F1 code appeared. The manual stated gas supply, igniter issues etc. I have checked the gas supply to the valve, all fine, on ignition I was getting 24v to the spark generator for about a second to try and eliminate the pcb. I am thinking that the gas valve is faulty as when I checked the outlet pressure I was getting a negative reading. Am I correct in this thinking?
Thanks
Kewat66

 

[Barry98]

Moved to private area

 

[zeebeedee]

My first thoughts would be aps then fan speed if not possible board

 

[Kewat66]

There is no APS on this boiler but can check fan speed

 

[arran197]

Your outlet pressure will be negative on these boilers. They're zero governor. The spark electrodes on these are unreliable and have had the design changed slightly. They're a bit of a pain to change, you'll need a socket set, but I would be tempted to start there first as they're low cost.

 

[jtsplumbing]

Your outlet pressure will be negative on these boilers. They're zero governor. The spark electrodes on these are unreliable and have had the design changed slightly. They're a bit of a pain to change, you'll need a socket set, but I would be tempted to start there first as they're low cost.

Agree with arran, I've had problems with these new set of electrodes & lead usely sort it

 

[Kewat66]

Thanks for this. I will give this a go and post back.

 

[Kewat66]

Hi All,
i replaced the igniter and lead and all worked for 2 weeks. Got a call the other day saying same fault code and same problem. Any other thoughts?
Thanks
kewat66

 

[jtsplumbing]

Did you change Electrodes ?

 

[southcoastboile]

Steady inlet pressure on start up? Condensate trap blocked, high and low flue gas readings set up correctly. That's probably the most likely thing, have had that a few times on that boiler.

 

[GrahamM]

Shed of a boiler!
First thing I would be doing is have look inside any signs moisture that would indicate burner gasket issues or collector seal issues.
Check burner gasket good and burner/heat exchanger in ok condition.
Check good/steady working pressure at boiler.
Check max/min CO and gas rate correct.
Check electrodes (5mm gap) & lead in good nick & pushed in fully(had that before)
Check condensate is clear.
Check flue seals/etc good.
Not getting a continuous spark on ignition could be spark gen unit.
If all above checks out would be leaning towards the board.

 

[Kewat66]

Hi,
yes I changed the ignition electrode and lead. All worked fine for a few weeks?
kewat66