How much does it cost to fix boiler error code 92?

Typical repair cost for the boiler 92 fault is £120-200 including labour.

92 High

Boiler Fault Code 92

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 92 appears across 6 boiler brands and 23 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that waste water produced during operation is not draining away properly, which is causing it to shut down to prevent damage. (As reported on Vokera Syntesi 25)

Pick your boiler brand for the 92 fix

Alpha 92 6 models Grant 92 6 models Keston 92 1 model Navien 92 1 model Viessmann 92 6 models Vokera 92 3 models

Source

Information for the 92 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