How much does it cost to fix Baxi error code E05?

Typical repair cost for the Baxi E05 fault is £90-160 including labour.

E05 High

Baxi E05 Fault Code

Q: What does the Baxi E05 fault code mean?

Your boiler has detected a problem with the internal sensor that monitors the temperature of the water being sent to your radiators, causing the system to shut down for safety.

The Baxi E05 fault code means: your boiler has detected a problem with the internal sensor that monitors the temperature of the water being sent to your radiators, causing the system to shut down for safety.. It appears on 7 Baxi models in our database.

Technical description: Central heating flow temperature sensor fault

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 E05 fault code

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

130 HE (range) Repair: £120-200
Duo-tec Combi Repair: £120-200
Main Combi 24 Repair: £120-180
Main Combi 28 Repair: £120-180
Promax Combi Repair: £90-160
Promax Heat Repair: £90-160
Promax Ultra Repair: £90-£160

Source

Baxi E05 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