How much does it cost to fix Ariston error code 6 P1?

Typical repair cost for the Ariston 6 P1 fault is £150-300 including labour.

6 P1 High

Ariston 6 P1 Fault Code

Q: What does the Ariston 6 P1 fault code mean?

Your boiler is struggling to clear exhaust gases due to a sensor sensing a blockage or a faulty fan, which forces the system to stop for safety reasons.

Also written as 6P1 — same fault.

The Ariston 6 P1 fault code means: your boiler is struggling to clear exhaust gases due to a sensor sensing a blockage or a faulty fan, which forces the system to stop for safety reasons.. It appears on 2 Ariston models in our database.

Technical description: Delay in air pressure switch closing

Typical repair cost £150-300 (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 6 P1 fault code

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

Source

Ariston 6 P1 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