How much does it cost to fix Ariston error code EE 1100?

Typical repair cost for the Ariston EE 1100 fault is £120-220 including labour.

EE 1100 Medium

Ariston EE 1100 Fault Code

Q: What does the Ariston EE 1100 fault code mean?

Your boiler has lost the connection to the temperature sensor that monitors your underfloor heating, so it has stopped that specific heating circuit for safety.

Also written as EE1100 — same fault.

The Ariston EE 1100 fault code means: your boiler has lost the connection to the temperature sensor that monitors your underfloor heating, so it has stopped that specific heating circuit for safety.. It appears on 4 Ariston models in our database.

Technical description: Under floor heating temperature probe in open circuit

Typical repair cost £120-220 (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 EE 1100 fault code

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

Source

Ariston EE 1100 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