How much does it cost to fix Intergas error code E11?

Typical repair cost for the Intergas E11 fault is £90-160 including labour.

E11 High

Intergas E11 Fault Code

Q: What does the Intergas E11 fault code mean?

Your boiler has detected a problem with one of its internal temperature sensors, which prevents it from monitoring the water returning to the unit correctly.

The Intergas E11 fault code means: your boiler has detected a problem with one of its internal temperature sensors, which prevents it from monitoring the water returning to the unit correctly.. It appears on 6 Intergas models in our database.

Technical description: Return sensor S2 defective

What causes the Intergas E11 fault?

This fault occurs when the boiler's control board loses communication with the sensor that monitors water coming back from your radiators. This is typically caused by the internal component failing due to age or a loose connection in the electrical wiring, meaning the boiler can no longer safely regulate its temperature.

Typical repair cost £90-160 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Intergas models that show the E11 fault code

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

Source

Intergas E11 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026