0.0 Low

British Gas 0.0 Fault Code

Also written as 00 — same fault.

The British Gas 0.0 fault code means: your boiler is simply showing the record of the most recent error it encountered to help a service engineer diagnose past issues.. It appears on 1 British Gas model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Last fault (displays any faults that have occurred for the information of the service engineer)
Typical repair cost £0 (including labour)

DIY fix possible

Press the 'Reset' button if the boiler is currently locked outMonitor the boiler to see if a specific error code appears during operationIf the boiler is working normally, no action is required

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British Gas models that show the 0.0 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

British Gas 0.0 fault code information on this page is sourced and cross-checked against the official British Gas service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026