Low
226 on Worcester Bosch Heatslave

Your boiler has recorded that a service tool was plugged in while checking the history of past errors, which is usually just an advisory note for an engineer.

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

Service tool has been connected in the blocking error history menu

DIY fix possible

Press the Reset button on the control panelSwitch the boiler power off at the fused spur, wait 30 seconds, and switch it back onMonitor the display to see if the code clears and the boiler operates normally

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful

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 →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →