BoilerFaultCodes 273 High
Boiler Fault Code 273
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 273 appears across 2 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's computer is having trouble communicating with the sensor that monitors your water pressure, meaning it cannot safely confirm everything is operating as it should. (As reported on Navien NCM 1130HH)
Pick your boiler brand for the 273 fix
Source
Information for the 273 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 31 August 2026