437 High

Boiler Fault Code 437

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 437 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 the signal from a temperature sensor that monitors the water returning to the system, causing the unit to stop working as a safety precaution. (As reported on Vokera Eclipse)

Pick your boiler brand for the 437 fix

Vokera 437 1 model

Source

Information for the 437 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