How much does it cost to fix boiler error code 1-A1?

Typical repair cost for the boiler 1-A1 fault is £0-90 including labour.

1-A1 Low

Boiler Fault Code 1-A1

Also written as 1A1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 1-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 is currently stuck in a temporary startup phase and is waiting for everything to be ready before it begins heating. (As reported on Worcester Bosch Greenstar 8000 Life/Style)

Pick your boiler brand for the 1-A1 fix

Worcester Bosch 1-A1 1 model

Source

Information for the 1-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