Symapthy
ickle - I sympathise with you. We put up with frequently failing pellet ignition elements for two years. It was a Gerkros type boiler. Eventually we replaced the pellet burner and its associated electronics and pellet feed assembly with an oil burner. An adapter plate was needed so that the oil burner fitted in to the port at the bottom of the boiler. Has worked 100% for two years now.
There are discussions of wood pellet boilers in a couple of forums ;; I'm not allowed to post links.
The forums are at boards dot ie
They are Plumbing & Heating
and Renewable Energies