Diesel stove/heating refused to fire last night. Listened carefully, couldn't hear the ignition spark. "Ah, the electrodes are coked up again"
Stove is very hot, so can't do anything last night. We have a solid fuel stove in living room, so no great hardship.
This morning, open up stove, give electrodes a polish. Test fire - electrodes spark immediately, but cut out before diesel starts spraying through nozzle.
Weird, thinks I, starting to suspect ignition capacitor is dying (I assume there is one).
Try it again - electrode doesn't spark at all.
Third time, ignition.
Now I'm wondering if it is the capacitor, and that it either is losing capacity or being very slow to 'fill'.