A01 fault code on ariston micro genius?

the A01 fault code is nearly always down to the pcb, 99% of the time in fact, its a common fault, but not common enough for ariston to be responsible for boilers out of the warantee. you can normaly check this yourself, while the tap is running check if the electrodes are still sparking even after the gas had lit, this means the pcb is not detecting the flame and trying to relight. eventualy it will lock out with a A01 code, if u reset it might work for a short time but eventualy u will get to the stage where it will no longer resart.

if your handy you can replace the pcb yourself, there is someone selling them on ebay for £85 thats a steel, its half the trade price never mind retail price!

pcb part number is 65103422 just search it on ebay!

Thermo man
July 2009

HI. There was a Client with the same Problem. It was the Gasreminder! There was a little bit Gas going throuw it but not enough. Please check if the Gaspressure behing it is strong enough. Andy

PS: Had another Client with Vaillant Therm, it was the same Problem. Good luck

Andy
November 2008

i am an engineer for ariston mts group. your problem will be possible faulty pcb. symtoms ... burner ignites and a spark can still be seen across electrodes by looking through sight glass..

daz
September 2008

We have exactly the same problem.... in process of trying to get someone to look at it. We were away for a week and when we came back it didnt work.
Have you had it fixed??

Nicola
September 2008