OF Low

Baxi OF Fault Code

The Baxi OF fault code means: your boiler is currently set to a state where the central heating function has been deactivated.. 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: Central Heating switched off

DIY fix possible

Check the control panel on the front of the boiler to ensure the heating mode is set to 'On' or 'Auto'Verify that your external room thermostat or wall-mounted timer is set to a temperature higher than the current room temperatureEnsure the central heating dial on the boiler control panel is turned up to a mid-to-high setting

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Baxi models that show the OF fault code

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

Source

Baxi OF 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