Low
204 on Worcester Bosch Greenstar CDi Compact

Your boiler is temporarily pausing because the water inside it has already reached the temperature you 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

System waiting, primary flow temperature above setpoint

From this model's manual
Verified against the Worcester Bosch Greenstar Cdi Compact installation & service manual, page 65.
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 that at least two radiator valves are fully openEnsure the room thermostat is turned up high enoughWait for the boiler to return to normal operation automaticallyIf the code persists, check that the pump is not seized

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