How much does it cost to fix boiler error code Fault 02 / 100?

Typical repair cost for the boiler Fault 02 / 100 fault is £250-£550 including labour.

Fault 02 / 100 High

Boiler Fault Code Fault 02 / 100

Also written as FAULT02100 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fault 02 / 100 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 main control unit is having a communication breakdown with its internal safety components, meaning it cannot operate safely and has shut down. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the Fault 02 / 100 fix

Worcester Bosch Fault 02 / 100 1 model

Source

Information for the Fault 02 / 100 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