Medium
268 on Worcester Bosch Greenstar 27CDi

Your boiler has performed an internal safety test of its electronic controls and is currently waiting for you to restart the system to see if the error clears.

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.

What the manual says

Manufacturer manual

Relay test was activated

From this model's manual
Verified against the Worcester Bosch Greenstar 27cdi installation & service manual, page 82.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Switch off the boiler at the fused spur or mains power switchWait for 60 secondsTurn the power back on to allow the boiler to perform a fresh self-test

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