BoilerFaultCodesBaxi DM029 Fault Code
The Baxi DM029 fault code means: your boiler is simply reporting that the hot water temperature has been adjusted via the control dial, and this is a normal status notification rather than a fault.. It appears on 1 Baxi model in our database.
Technical description: DHW temperature set point °C
DIY fix possible
Check your hot water temperature dial on the front of the boilerAdjust the dial to your preferred comfort levelObserve the display to ensure the code clears as the setting updates
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Baxi models that show the DM029 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi DM029 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