thats normally associated with a gas fault. if u can see a spark then it either a gas valve faulf or pcb. if theres no ignition then maybe faulty pcb. or even check the gas pressure on the boiler all these need to be diagnosed one at a time to fault find the problem. the grundfoss pump is not associated to this problem i myself have done many the same. its just sometimes boiler problem occur close to each other that people associate them as one
kash
December 2012
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