How much does it cost to fix boiler error code 0-A1?

Typical repair cost for the boiler 0-A1 fault is £0-80 including labour.

0-A1 Low

Boiler Fault Code 0-A1

Also written as 0A1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 0-A1 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 has been manually switched off or into a service mode and simply needs to be restarted or reset to resume normal operation. (As reported on Worcester Bosch Greenstar 2000)

Pick your boiler brand for the 0-A1 fix

Worcester Bosch 0-A1 1 model

Source

Information for the 0-A1 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