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

Typical repair cost for the Worcester Bosch Fault fault is £150-350 including labour.

Fault High

Worcester Bosch Fault Fault Code

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

Your boiler is struggling to burn the gas cleanly, which is causing an internal vibration or rumbling noise that requires professional attention.

Also written as FAULT — same fault.

The Worcester Bosch Fault fault code means: your boiler is struggling to burn the gas cleanly, which is causing an internal vibration or rumbling noise that requires professional attention.. It appears on 2 Worcester Bosch models in our database.

Technical description: Excessive burner noise, rumbling noises

Typical repair cost £150-350 (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 Fault fault code

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

Source

Worcester Bosch Fault 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