H.03.17 Low

Baxi H.03.17 Fault Code

Also written as H0317 — same fault.

The Baxi H.03.17 fault code means: your boiler is simply performing a routine internal safety test and should return to normal operation shortly.. It appears on 2 Baxi models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Periodic safety check in progress
Typical repair cost £0 (including labour)

DIY fix possible

Wait for the boiler to complete the test (usually takes a few minutes)Check if the display returns to the normal temperature readingNo action is required unless the code remains on the screen for an extended period

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Baxi models that show the H.03.17 fault code

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

Source

Baxi H.03.17 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