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The mains stopcock was turned off while the boiler was still on. Now it won't start. There is a hum, a click and then the igniter sparks but there is no ignition. Is there something obvious I'm missing? Should I looking for something in the system or is it boiler fault, such as a...

Hi, Our Potterton netaheat 10-16 main gas burner doesn’t fire up – the pilot does light. I have replaced the PCB (which hasn’t made any difference) and whilst doing so I noticed that part of the electrode lead connector has sheared off. Is that likely to be the problem and where can I...