Boiler Fault Code 97:2

Also written as 972 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 97:2 appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having difficulty communicating with part of your heating control system, but it will continue to work using its own internal information. (As reported on Viessmann Vitodens 300-W)