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Mend Ferroli Optimax 25 C Boiler Pcb Temperature

how to fix ferroli optimax 25 c?

why would heating stay on continuous wth r stat link removed and timer link out, only controll that works is temp dial for rads on front controll panel,boiler stays lit untill turned round to summer setting, board has been re programmed twice, poss new pcb,any help would be great.

marc
January 2015

Ferroli Ferroli Optimax 25 C Heating, Home Heating Systems Boiler Pcb Temperature

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Ferroli Optimax 25C: Heating Stays On - Fix?