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Mend Ferroli Start Changed Switch

how can i fix my boiler ferroli optimax 25c?

will not start, i,ve changed pcb , pump, diverter switch, i think the new pcb may need re-programming but i dont have the codes , can anyone advise please.

pat
January 2013

Ferroli Heating, Home Heating Systems Start Changed Switch

hi kash
heating engineer has just left, it seems that these pcb do need reprogramming after all , working ok for now. but thonkyou for your help anyway,

pat
January 2013

thanks for that, heating engineer replaced these parts, my first thought was the safty overheat sensor but he said not. last time i checked the water in the tap was getting very hot for a minuite but then ran cold, also no heating .

pat
January 2013

what is happening to it, pcbs dont need reprogramming there manufacturer set. is there power there, does the fan run, have u checked air pressure switch, overheat stat. what made u change all these parts

kash
January 2013

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Ferroli Optimax 25C Boiler Not Starting - Help