Min - Max Low

Boiler Fault Code Min - Max

Also written as MINMAX — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Min - Max appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently in a manual setup mode for output adjustments rather than reporting a functional breakdown. (As reported on Alpha Intec 28GS)

Pick your boiler brand for the Min - Max fix

Alpha Min - Max 4 models

Source

Information for the Min - Max fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026