Autodiagnostics faulty High

Ariston Autodiagnostics faulty Fault Code

Also written as AUTODIAGNOSTICSFAULTY — same fault.

The Ariston Autodiagnostics faulty fault code means: your boiler's computer system has detected an internal error, meaning it can no longer safely monitor or control the heating process.. It appears on 1 Ariston model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: led 7
Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ariston models that show the Autodiagnostics faulty fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ariston Autodiagnostics faulty fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

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