How much does it cost to fix Ariston error code EE 3311?

Typical repair cost for the Ariston EE 3311 fault is £100-£180 including labour.

EE 3311 Low

Ariston EE 3311 Fault Code

Q: What does the Ariston EE 3311 fault code mean?

Your boiler is receiving an incorrect signal from its external temperature sensor, which usually means the wiring connected to the small box on your outside wall has been damaged or has become loose.

Also written as EE3311 — same fault.

The Ariston EE 3311 fault code means: your boiler is receiving an incorrect signal from its external temperature sensor, which usually means the wiring connected to the small box on your outside wall has been damaged or has become loose.. It appears on 4 Ariston models in our database.

Technical description: Outdoor sensor in short circuit

Typical repair cost £100-£180 (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 3311 fault code

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

Source

Ariston EE 3311 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