Fixed red LED High

Alpha Fixed red LED Fault Code

Also written as FIXEDREDLED — same fault.

The Alpha Fixed red LED fault code means: your boiler has stopped circulating water because a critical internal component is stuck, meaning you currently have no heating or hot water.. It appears on 1 Alpha 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: ATTENTION! The pump is blocked but still live.
Typical repair cost £150-300 (including labour)

DIY fix possible

Turn the boiler power off and then back on to see if the pump restartsLocate the selector switch and turn it to the 'Reset' position for 5 seconds, then back to 'On'Check that your radiator valves are open to ensure water can flow

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Alpha models that show the Fixed red LED fault code

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

Source

Alpha Fixed red LED fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

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