How much does it cost to fix boiler error code 142?

Typical repair cost for the boiler 142 fault is £150-£450 including labour.

142 High

Boiler Fault Code 142

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 142 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal components are struggling to talk to each other, which has caused the system to stop working for safety. (As reported on Viessmann Vitodens 100-W B1GA)

Pick your boiler brand for the 142 fix

Viessmann 142 1 model

Source

Information for the 142 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