BoilerFaultCodes 499 Medium
Boiler Fault Code 499
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 499 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 has lost communication with the weather sensor installed outside your home, meaning it can no longer automatically adjust its settings based on the outside temperature. (As reported on Ideal Logic Air)
Pick your boiler brand for the 499 fix
Source
Information for the 499 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