Low
203 on Worcester Bosch Greenstar 8000 Style

Your boiler is currently idle and is not reporting a fault, it is simply waiting for a signal from your thermostat to provide heating or hot 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.

Technical description

Boiler in standby, no heat energy demand

Engineer required

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

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