Combi panel yellow High Limit LED High

Firebird Combi panel yellow High Limit LED Fault Code

Also written as COMBIPANELYELLOWHIGHLIMITLED — same fault.

The Firebird Combi panel yellow High Limit LED fault code means: your boiler has switched itself off because the water inside became too hot, triggered by a safety sensor to protect the system.. It appears on 1 Firebird model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: High-limit thermostat activated — water reached 110°C; manual reset required
Typical repair cost £90-180 (including labour)

DIY fix possible

Wait for the boiler to cool down completely (at least 20-30 minutes).Locate the manual reset button for the high-limit thermostat, usually found under a small black screw cap on the control panel.Unscrew the cap and press the reset button firmly; you should hear a click.Restart the boiler and check that your radiator valves are open and the system pressure is between 1 and 1.5 bar.

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Firebird models that show the Combi panel yellow High Limit LED fault code

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

Source

Firebird Combi panel yellow High Limit LED 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 7 July 2026