How much does it cost to fix Ariston error code 411?

Typical repair cost for the Ariston 411 fault is £90-180 including labour.

411 Medium

Ariston 411 Fault Code

Q: What does the Ariston 411 fault code mean?

Your boiler has lost communication with the main thermostat or temperature sensor in your primary living area, meaning it doesn't know when to turn the heating on or off.

The Ariston 411 fault code means: your boiler has lost communication with the main thermostat or temperature sensor in your primary living area, meaning it doesn't know when to turn the heating on or off.. It appears on 1 Ariston model in our database.

Technical description: Room sensor circuit open or short circuit zone 1

Typical repair cost £90-180 (including labour)

DIY fix possible

Check if your room thermostat or sensor has run out of batteries and replace them if necessary.Ensure the thermostat is within range of the boiler and has not been moved behind a large metal object or thick wall.Try restarting the boiler using the Reset button to refresh the sensor connection.

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Ariston models that show the 411 fault code

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

Alteas One Repair: £90-180

Source

Ariston 411 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