BoilerFaultCodes 65:2 High
Boiler Fault Code 65:2
Also written as 652 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 65:2 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 trouble directing water to your radiators or taps because an internal motor has likely become stuck or failed. (As reported on Viessmann Vitodens 300-W)
Pick your boiler brand for the 65:2 fix
Source
Information for the 65:2 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 27 April 2026