Medium
Reset Button Illuminated on Worcester Bosch Greenstar 12i System

Your boiler has detected a minor internal error and has safely paused operation until you manually restart it.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

The boiler has a fault condition and requires a reset.

DIY fix possible

Locate the blue reset button on the front control panel.Press and hold the button for 3 to 5 seconds until the light stops flashing.Wait a few minutes to see if the boiler fires up and maintains operation.

Find a Gas Safe engineer
Search the official register →

Related fault codes

EAView →D1View →CEView →

Related guides you might find useful

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

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 →