AM091 Low

Baxi AM091 Fault Code

The Baxi AM091 fault code means: your boiler is simply displaying a status message to indicate whether it is set to provide heating or just hot water, rather than reporting an actual fault.. 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: Season mode (0: winter, 1: winter (antifreeze), 2: summer (neutral), 3: summer)

DIY fix possible

Check your boiler control panel to see which mode is currently selected.Use the winter/summer button or dial to switch between heating and hot water settings as needed.Consult your user manual to confirm which code corresponds to your desired seasonal operation.

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Baxi models that show the AM091 fault code

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

Source

Baxi AM091 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