How much does it cost to fix Ariston error code EE 0099?

Typical repair cost for the Ariston EE 0099 fault is £120-220 including labour.

EE 0099 High

Ariston EE 0099 Fault Code

Q: What does the Ariston EE 0099 fault code mean?

Your boiler has detected an electrical fault with one of its temperature sensors, meaning it cannot accurately read the water temperature and has shut down to protect itself.

Also written as EE0099 — same fault.

The Ariston EE 0099 fault code means: your boiler has detected an electrical fault with one of its temperature sensors, meaning it cannot accurately read the water temperature and has shut down to protect itself.. It appears on 4 Ariston models in our database.

Technical description: Heating return temperature probe in short-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 0099 fault code

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

Source

Ariston EE 0099 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