370 High

Boiler Fault Code 370

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 370 appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your heat pump unit is struggling to communicate with the system, meaning your heating or hot water may stop working until the connection is restored. (As reported on Ideal Logic Air)

Pick your boiler brand for the 370 fix

Ideal 370 1 model Viessmann 370 1 model

Source

Information for the 370 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