Hot Water Active (Green) Low

Firebird Hot Water Active (Green) Fault Code

Also written as HOTWATERACTIVEGREEN — same fault.

The Firebird Hot Water Active (Green) fault code means: your boiler is working exactly as it should and is currently heating water for your taps or shower.. It appears on 1 Firebird 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: This signifies that the boiler is currently providing hot water. A solid green light here also indicates normal operation.
Typical repair cost £0 (including labour)

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Firebird models that show the Hot Water Active (Green) fault code

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

Source

Firebird Hot Water Active (Green) fault code information on this page is sourced and cross-checked against the official Firebird service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026