How much does it cost to fix Worcester Bosch error code 9A 362?

Typical repair cost for the Worcester Bosch 9A 362 fault is £180-350 including labour.

9A 362 High

Worcester Bosch 9A 362 Fault Code

Q: What does the Worcester Bosch 9A 362 fault code mean?

Your boiler’s internal computer chip is giving an error message because it thinks it has been fitted with the wrong component or cannot communicate with it.

Also written as 9A362 — same fault.

The Worcester Bosch 9A 362 fault code means: your boiler’s internal computer chip is giving an error message because it thinks it has been fitted with the wrong component or cannot communicate with it.. It appears on 10 Worcester Bosch models in our database.

Technical description: error – incorrect HCM fitted

Typical repair cost £180-350 (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 9A 362 fault code

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

Source

Worcester Bosch 9A 362 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