Fault Condition 11 Low

Worcester Bosch Fault Condition 11 Fault Code

Also written as FAULTCONDITION11 — same fault.

The Worcester Bosch Fault Condition 11 fault code means: your boiler is displaying a status that typically indicates the appliance is in a standard standby or operating mode rather than a fault, meaning it is working exactly as it should.. It appears on 2 Worcester Bosch models in our database.

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: Operating Instructions Quick Reference

Engineer required

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

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Worcester Bosch models that show the Fault Condition 11 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch Fault Condition 11 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026