BoilerFaultCodes
Ariston Boiler Fault Codes
1,855 fault codes across 33 Ariston boiler models — explained in plain English.
Italian heating and water heating manufacturer with global presence.
Just want the most common Ariston problems?
The top 8 faults across the whole Ariston range — causes, DIY checks, repair costs.
High-severity Ariston fault codes
1 01 1 02 1 03 1 04 1 05
Your boiler has detected that it is getting too hot and has automatically shut down to prevent damage to its internal systems.
Clas HE 24
Your boiler is struggling to detect the water pressure inside the system because the sensor that monitors it is either faulty or unable to get a clear reading.
Clas HE 24
Your boiler is struggling to move water through your heating system effectively, preventing it from heating your home properly.
Clas HE 24
Your boiler is struggling to move water through your radiators, likely because the internal pump is blocked or the system pressure is too low.
Clas HE 24
Your boiler is struggling to push water around your heating system, likely because the radiators are blocked, a valve is shut, or the pump is having trouble.
Clas HE 24
All models
33 Ariston boiler models
Clas HE 24
Combi Discontinued
Clas HE 28
Combi Discontinued
Clas HE 35
Combi Discontinued
Alteas One
Combi
Genus One 24
Combi Discontinued
Genus One 30
Combi
E-Combi One 24
Combi
E-Combi One 30
Combi
Genus 24 RFFI
Regular Discontinued
Genus 27 RFFI
Regular Discontinued
Euro Combi 30 MFFI
Combi Discontinued
Micro Combi 27 MFFI
Combi Discontinued
Bravo 24 MFFI
Combi Discontinued
Euro Prisma 24
Combi Discontinued
DIA 80
System Discontinued
Genus Premium
Combi Discontinued
Clas One
Combi
Clas System 28
System Discontinued
E-Combi One
CombiSystem
Genus 24 MFFI
Combi Discontinued
HS Premium
Combi
Genus 15 RFFI
Regular Discontinued
Clas Net One
Combi
Egis
Combi Discontinued
Egis 24 MFFI
Combi Discontinued
Clas HE Evo
SystemCombi Discontinued
E-Combi Evo
Combi Discontinued
Genus 27
Combi Discontinued
Genus 30 Plus
Combi Discontinued
Microsystem 15
Regular Discontinued
Eurocombi 20 1mfs
Combi Discontinued
Challenger 80E
Combi Discontinued
Excalibur
Combi Discontinued