00 Low

Boiler Fault Code 00

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 00 appears across 8 boiler brands and 30 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is working perfectly and is currently in standby mode because it has reached the temperature set on your thermostat or programmer. (As reported on Ideal Logic+ Heat H)

Pick your boiler brand for the 00 fix

Alpha 00 2 models Atag 00 6 models Ferroli 00 2 models Glow-worm 00 3 models Ideal 00 9 models Remeha 00 3 models Saunier Duval 00 4 models Vokera 00 1 model

Source

Information for the 00 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