2H Low

Boiler Fault Code 2H

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 2H appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning This code is not a fault; it is an informational message confirming your boiler is correctly configured for the standard natural gas supply used in the UK. (As reported on Keston Combi 2)

Pick your boiler brand for the 2H fix

Keston 2H 1 model Potterton 2H 1 model

Source

Information for the 2H 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 7 July 2026