Low
204 on Worcester Bosch Greenstar 30i

Your boiler is currently taking a temporary break because the water inside it is already hotter than the temperature you have requested.

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

The boiler is waiting – the actual temperature is higher than the calculated or selected boiler temperature

Shared across the 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 if your room thermostat or programmer is set too lowEnsure your radiator valves are open to allow heat to dissipateWait up to 15 minutes for the system to cool down naturally and restart

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Related fault codes

203View →208View →

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