Low
204 on Worcester Bosch Greenstar 4000

Your boiler has temporarily paused heating 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

Current prim. water temp. higher than set val. - System waiting. The actual boiler water temperature is higher than the target boiler water temperature. The boiler heat demand is switched off.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar 4000 installation & service manual, page 71.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 105 fault codes on the Greenstar 4000

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

200201202203208214224227228232233234235237238242245249250251252253254258259262263265268269273281283284305306353357358360362363810811101010131017101810191021102210231037106510681070107110721073107410751076208529082910291429152916292029232927292829312940294629482949295029512951 V29522952 V29572957 V29612961 V29622962 V29632963 B29642964 B29652965 B29662966 B29672967 B29702970 B29712971 B29722972 V

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