potterton netaheat mk2 f spark generator

29 Oct 2011
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United Kingdom
have a problem with my netaheat ignition, turn boiler on, fan runs, spark generator ignites pilot, but continues sparking, the pilot looks to have a good flame, the electrode seems to be in the flame but boiler does not fire up with the spark generator continuing to click away. think maybe faulty spark generator or mercury vapour valve but not sure which. Am tempted to start with new spark generator as easy to do. any ideas.
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No advice other than to call in someone who knows these boilers. In the wrong hands they can be dangerous. They are not for a diyer.

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