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Mend Ariston micro genus 24 Boiler Heating Fault Code

A03 code what do I do ?

My Ariston micro genus 24 has stopped working with a fault code A03 any ideas

sue
January 2013
AristonAriston micro genus 24Heating, Home Heating SystemsBoiler Heating Fault Code

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Ariston Genus 24 A03 Fault Code - Fixes