How much does it cost to fix Baxi error code E10?

Typical repair cost for the Baxi E10 fault is £90-160 including labour.

E10 Low

Baxi E10 Fault Code

Q: What does the Baxi E10 fault code mean?

Your boiler has lost communication with the sensor that monitors the temperature outside your home, preventing it from adjusting its heat output efficiently.

The Baxi E10 fault code means: your boiler has lost communication with the sensor that monitors the temperature outside your home, preventing it from adjusting its heat output efficiently.. It appears on 35 Baxi models in our database.

Technical description: Outdoor sensor fault

What causes the Baxi E10 fault?

This fault occurs when the boiler is no longer receiving a consistent signal from the sensor located on the outside of your property. The most common reasons are physical damage to the external sensor unit or the electrical wiring being corroded or disconnected, which prevents the boiler from knowing how cold it is outside.

This fault is more frequent during autumn and winter as high winds, heavy rain, or freezing temperatures can displace the sensor or cause moisture to enter the wiring connections.

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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Baxi models that show the E10 fault code

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

Source

Baxi E10 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

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