SOURCE: vokera mynute 14se lockout reset button on
Has the boiler cool down? Try turn the power off for a few minutes and see if that will work.
SOURCE: ariston A01 fault combi boiler
its not definately the pcb. change the detection sensor first( £3.20p). if this doesnt fix a01 fault then change the main pcb(£145).
SOURCE: MY BOILER IS SHOWONG A01 CODE. I AM A THICK FEMALE
no make of boiler given manual can be read by a friend simpe to ckeck and everyone has a friend best of luck
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