BoilerFaultCodes 220 Emergency
Boiler Fault Code 220
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 220 appears across 2 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected an issue with the air supply or exhaust fumes, meaning it has safely shut down to prevent the risk of harmful gases building up in your home. (As reported on Potterton Osprey CF 125)
Pick your boiler brand for the 220 fix
Source
Information for the 220 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