Low
203 on Worcester Bosch Greenstar 8000 Life Regular

Your boiler is perfectly healthy and is simply waiting for a signal from your thermostat to start heating your home or water.

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

Boiler in standby, no heat energy demand

Shared across the Greenstar 8000 range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
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

Check your room thermostat or smart controller settingsEnsure your heating timer is scheduled to be 'ON'Turn up the temperature on your thermostat to see if the boiler fires up

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Related fault codes

202View →

All 107 fault codes on the Greenstar 8000 Life Regular

Seeing a different code? Every code this model can display, in one place.

1-A21-d31-d41-E11-E21-E31-E41-EA1-Eb2002012022042082142242272282292322332342352372382422442452462472482492502512522532542572582592622632652682692732812832843063573583603623636048151010101310181019102210231025103710681070107110721075107620852908291029142915291629202923292429252926292729282931294029462948294929502951295229552956295729612962296329652965 B29662966 B296829692972D4

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