Low
305 on Worcester Bosch Greenstar 8000+ Style

Your boiler is temporarily pausing the hot water production to prevent itself from overheating or cycling on and off too frequently.

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 hot water anti-cycle mode

Shared across the Greenstar 8000+ Style 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

Wait up to 15 minutes for the anti-cycle timer to expireEnsure hot water taps are fully closedCheck that the hot water temperature setting on the control panel is not set excessively high

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Related fault codes

208View →306View →

All 99 fault codes on the Greenstar 8000+ Style

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

2002012022032042082142242272282292322332342352372382422442452492502512522532542572582592622632652682692732812832843063573583603623636048151010101310171018101910211023102510371065106810701071107210751076208529082910291429152916292029232924292529262927292829312940294629482949295029512952295529562957296129622963296529662968296929702971297229802981

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