Low
2 pulses on Worcester Bosch 26 CDi Xtra

Your boiler has been manually set to run at its lowest power level for testing, which prevents it from heating your home normally.

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

Check service mode switch is in minimum position

DIY fix possible

Locate the service mode switch or dial on the control panelEnsure the switch is turned back to the 'Normal' or 'Off' position rather than the 'Min' settingPress the reset button to clear the flashing light

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →