Glow-worm Ultimate not lighting

Glow-worm Ultimate not lighting every attempt. Sometimes it lights straight away, other times it sparks for a long time before lighting. A common problem on these models, the pilot jets get blocked quite easily reducing the size of the pilot flame. This can prevent enough gas getting through for it to light the pilot flame, or the flame is too small and the boiler fails to rectify the flame.

To rectify this, the pilot injector is removed from the pilot assembly. This injector is unusual in  that there are two holes in the injector for gas to pass through. Both these holes need to be clean and unobstructed. A simple way to clean the through is to put some water into the injector and force it through. Once the holes are clear of any obstructions the boiler can be re-assembled and relit. This time the pilot lights first attempt with a good flame, and crosslights the burner.

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.