flame failure High

Ariston flame failure Fault Code

Also written as FLAMEFAILURE — same fault.

The Ariston flame failure fault code means: your boiler is trying to start but cannot detect a flame, meaning it is currently unable to provide heating or hot water.. It appears on 2 Ariston models 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: NB.: It may be necessary to reset the flame failure reset a number of times during this operation
Typical repair cost £120-250 (including labour)

Engineer required

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

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Ariston models that show the flame failure fault code

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

Source

Ariston flame failure 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