How much does it cost to fix Ariston error code 1 02?

Typical repair cost for the Ariston 1 02 fault is £120-250 including labour.

1 02 High

Ariston 1 02 Fault Code

Q: What does the Ariston 1 02 fault code mean?

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.

Also written as 102 — same fault.

The Ariston 1 02 fault code means: 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.. It appears on 9 Ariston models in our database.

Technical description: Pressure Sens Error

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 1 02 fault code

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

Source

Ariston 1 02 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