Medium
232 on Worcester Bosch Greenstar 2000

Your boiler has been told to stop running by an external device, such as a smart thermostat or a frost protection controller.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Boiler locked by external switching contact. Check red 13 connection, external condensate pump feedback, or external temperature monitor.

Engineer required

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

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