Ariston Boiler Fault Codes

Ariston fault codes on this site

We document 1,399 fault codes across 44 Ariston models, covering 349 distinct codes. Ariston boilers use light sequences and status descriptions rather than numbered codes. Codes for 40 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Clas HE 24, Clas HE 28, Clas HE 35, Alteas One, Genus One 24, Genus One 30, E-Combi One 24, E-Combi One 30, Ecogenus 24 RFFI System, Combi A 30 MFFI, Micro Combi 27 MFFI, Ecogenus 24 MFFI, Clas One, Clas System 28, E-Combi One, Genus 24 MFFI, HS Premium, Clas Net One, Egis, Egis 24 MFFI, Clas HE Evo, E-Combi Evo, Genus 27, Genus 30 Plus, Microsystem 15, Eurocombi 20 1mfs, Challenger 80E, Excalibur, Clas HE R, Micro Condens, Genus, Genus HE, Genus ONE Net, Genus ONE+ WiFi, Clas ONE System, Clas ONE R, E-System ONE, Eurocombi A/23 MFFI, Microcombi 23 MFFI, Ecosystem 27 RFFI, ACO 27 MFFI, ACO 32 MFFI, Clas HE R 12, Clas HE R 18.