How much does it cost to fix boiler error code AUTODIAGNOSIS FAULTY?

Typical repair cost for the boiler AUTODIAGNOSIS FAULTY fault is £180-350 including labour.

AUTODIAGNOSIS FAULTY High

Boiler Fault Code AUTODIAGNOSIS FAULTY

Also written as AUTODIAGNOSISFAULTY — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code AUTODIAGNOSIS FAULTY appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has detected a general processing error and cannot tell exactly what is wrong, causing the system to stop working for safety. (As reported on Ariston Egis 24 MFFI)

Pick your boiler brand for the AUTODIAGNOSIS FAULTY fix

Ariston AUTODIAGNOSIS FAULTY 1 model

Source

Information for the AUTODIAGNOSIS FAULTY fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026