Glow worm not heating properly

[crispin1240]

MyG/W fuelsaver f 80btu has developed an annoying habit of not igniting, sometimes for hours. the pilot and spark come on, but the second "click" which i guess is the gas valve opening is intermittent and today (being vvcold) it's worse than ever. Had the gas valve replaced which made no difference.
Thanks

 

[gasgeezer]

possibly pcb/ign. lead not rectifying or insufficient gas pressure maybe bad earth

 

[crispin1240]

Strange thing is that some times it will fire up and run ok for ages then like today start/stop and so on. it always seems to spark and the pilot stays on.

 

[Soggy_weetabix]

Probable pilot restiction not allowing rectification. (When was boiler last serviced?) Classic intermittant fault.

CORGI territory though.

David

 

[crispin1240]

Corgi had a look and diagnosed the pilot jet, which he said would lead to intermittent ignition etc. cleaned it up, now wotking ok. will fit a new one and ignition tip soon.