V
vipey
Hi my friend today changed his programmer for his boiler as it kept on tripping the fuse and not turning on it was also burnt on back and smelt so wasn't good .so swapped it like for like for another Honeywell st699b programmer after doing this his boiler will not fire up he says the pump is coming on and also the divertor valve sounds like its moving could he be missing somethink here ? its a regular glow worm boiler don't no model , could he have burnt the pcb out somehow ? , he surely couldn't have wired it wrong as he didn't even have to touch the wireing as was on a plate . any ideas would be greatfull