Low
Min - Max on Alpha Intec 50CS

Your boiler is currently in a manual setup mode for output adjustments rather than reporting a functional breakdown.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Adjustable operating curves (Blue LED)

DIY fix possible

Locate the selector switch on the control panelTurn the selector switch back to the 'On' or 'Auto' positionWait for the blue LED to stop flashing and return to its normal state

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

New boiler cost 2026

Realistic UK prices for a swap.

Read →