Medium
208 on Worcester Bosch Greenstar 8000 Life Regular

Your boiler has been accidentally switched into a testing mode used by engineers to check combustion levels, which stops it from heating your home normally.

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

Appliance in service Test mode (Min/Max)

From this model's manual
Verified against the Worcester Bosch Greenstar 8000 Life Regular installation & service manual, page 69.
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

Locate the 'Chimney Sweep' or 'Service' button on the boiler control panel.Press the button once to exit the current mode.If the code persists, try turning the boiler off at the fused spur switch for 30 seconds and turning it back on to reset the system.

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