BoilerFaultCodesBaxi CM210 Fault Code
The Baxi CM210 fault code means: your boiler is simply displaying the current temperature from an outdoor sensor and is not indicating a fault with your heating system.. It appears on 1 Baxi model in our database.
Technical description: Outside temperature in the zone °C
DIY fix possible
Check your boiler control panel display settings.Press the reset or back button to return to the main home screen.Refer to your user manual to toggle the display view if you prefer to see time or pressure instead of the outdoor temperature.
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Baxi models that show the CM210 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi CM210 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