353 Low

Boiler Fault Code 353

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 353 appears across 4 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 has temporarily paused itself because it hasn't had a proper break in the last 24 hours, so it is just waiting for a short cooling-off period to restart. (As reported on Worcester Bosch Greenstar 12i System)

Pick your boiler brand for the 353 fix

ECA 353 1 model Navien 353 3 models Viessmann 353 1 model Worcester Bosch 353 3 models

Source

Information for the 353 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