pcb is main cause of problems with this boiler.if the boiler work after you reset it then pcb is the problem.these boiler should have pump over run which is proberly why the pump still runs.when off.an decent engineer will fix this.pcb are over priced.anything between £150-250.potterton are the cause of this.as am not on site cant be 100% but hopes this helps.
james turley
September 2008
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