E.01 – .17 High

Baxi E.01 – .17 Fault Code

Also written as E0117 — same fault.

The Baxi E.01 – .17 fault code means: your boiler has stopped working because water isn't moving through the system correctly or a internal sensor has lost its connection.. It appears on 24 Baxi models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Reset the boiler – no circulation, sensor fault either not connected or has a bad connection.

What causes the Baxi E.01 – .17 fault?

This fault occurs when the boiler's internal computer detects that water isn't flowing through the heat exchanger, or it loses contact with the sensors that monitor temperature. The most common reason is a failed circulation pump that can no longer move water around your radiators, or a loose electrical connection between the sensors and the main control board.

This issue is more frequent in autumn when heating systems are turned back on after a summer of inactivity, which can cause the internal pump to seize.

Typical repair cost £120-280 (including labour)

DIY fix possible

Locate the reset button or selector switch on the front of the boiler panelPress and hold the reset button for at least five secondsCheck that your radiator valves are open and that the system pressure is between 1 and 1.5 bar

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Baxi models that show the E.01 – .17 fault code

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

Source

Baxi E.01 – .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 27 April 2026