How much does it cost to fix boiler error code Error 00?

Typical repair cost for the boiler Error 00 fault is £150-300 including labour.

Error 00 High

Boiler Fault Code Error 00

Also written as ERROR00 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Error 00 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to light correctly or stay lit, which means it will not be able to provide heating or hot water until the issue is resolved. (As reported on Atag Q 25CR)

Pick your boiler brand for the Error 00 fix

Atag Error 00 8 models

Source

Information for the Error 00 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