2.0 Low

British Gas 2.0 Fault Code

Also written as 20 — same fault.

The British Gas 2.0 fault code means: your boiler is currently operating normally in it's standard heating or hot water mode, and this code is an status indicator rather than an error.. 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: Operating mode
Typical repair cost £0 (including labour)

DIY fix possible

Check your thermostat to ensure it is calling for heatMonitor the display to see if the code changes when the heating turns offNo action is required as this is a normal status message

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British Gas models that show the 2.0 fault code

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

Source

British Gas 2.0 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