BoilerFaultCodes Toggle on/off Low
Boiler Fault Code Toggle on/off
Also written as TOGGLEONOFF — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Toggle on/off appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is simply flashing because the reset button was tapped, and it is waiting for a moment to restart its normal cycle. (As reported on Worcester Bosch Greenstar 35 CDi)
Pick your boiler brand for the Toggle on/off fix
Source
Information for the Toggle on/off 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