CM030 Low

Baxi CM030 Fault Code

The Baxi CM030 fault code means: this code is simply displaying the current temperature inside your home rather than indicating a fault with your boiler.. It appears on 1 Baxi model 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: Current room temperature for zone °C

DIY fix possible

Check your thermostat or boiler control panel settingsPress the back or menu button to return to the standard display modeConsult your user manual to adjust the display preferences

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Baxi models that show the CM030 fault code

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

Source

Baxi CM030 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