How much does it cost to fix Worcester Bosch error code 13?

Typical repair cost for the Worcester Bosch 13 fault is £120-250 including labour.

13 High

Worcester Bosch 13 Fault Code

Q: What does the Worcester Bosch 13 fault code mean?

Your boiler has experienced a power interruption following an earlier internal safety shutdown, meaning it has now locked itself to prevent operation until a reset is performed.

The Worcester Bosch 13 fault code means: your boiler has experienced a power interruption following an earlier internal safety shutdown, meaning it has now locked itself to prevent operation until a reset is performed.. It appears on 2 Worcester Bosch models in our database.

Technical description: Locking Mains voltage interrupted after locking error

Typical repair cost £120-250 (including labour)

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 13 fault code

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

Source

Worcester Bosch 13 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