E.00.17 Medium

Baxi E.00.17 Fault Code

Also written as E0017 — same fault.

The Baxi E.00.17 fault code means: your boiler has detected a fault with the sensor that monitors your hot water temperature, meaning it cannot safely heat your water to the correct level.. It appears on 7 Baxi models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: DHW tank temperature sensor short-circuited
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 E.00.17 fault code

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

Source

Baxi E.00.17 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 7 July 2026