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replaced pcb all working fine now :D many thanks to agile for all his assist

no one has touched boiler heating hasnt been on for a couple of months only noticed problem when tried to turn it on this week all worked fine prior to that

yes on is displayed in digital panel but only one green light showing have checked fault finding in manual and they suggest either diverter valve or pcb as diverter works when reset is pushed i assume its pcb

wonder if anyone can help hot water works fine but no central heating,if you hold in reset button boiler fires up and heating pipe starts to warm up but as soon as you let go of reset button boiler shuts down no fault lights showing just one green light on left hand side i think it is poss the...