Low
1023 on Worcester Bosch Greenstar 8000 Style Combi

Your boiler has been running for a very long time without a break and has automatically paused to prevent overheating or excessive wear.

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.

What the manual says

Manufacturer manual

Maximum run time including standby time reached

From this model's manual
Verified against the Worcester Bosch Greenstar 8000 Life Style installation & service manual, page 78.
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 the boiler off at the fused spur or mains isolation point.Wait for 60 seconds to allow the internal electronics to reset.Switch the boiler back on and observe if it operates normally.

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