BoilerFaultCodes Error 28 High
Boiler Fault Code Error 28
Also written as ERROR28 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Error 28 appears across 2 boiler brands and 10 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 that the internal fan responsible for clearing exhaust gases is not spinning correctly, and it has safely shut itself down to prevent unsafe operation. (As reported on Atag E22c)
Pick your boiler brand for the Error 28 fix
Source
Information for the Error 28 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