How much does it cost to fix Worcester Bosch error code A8 362?

Typical repair cost for the Worcester Bosch A8 362 fault is £180-£450 including labour.

A8 362 High

Worcester Bosch A8 362 Fault Code

Q: What does the Worcester Bosch A8 362 fault code mean?

Your boiler is not receiving the steady supply of electricity it needs to run, which is usually caused by an internal circuit board fault or a problem with the local power supply.

Also written as A8362 — same fault.

The Worcester Bosch A8 362 fault code means: your boiler is not receiving the steady supply of electricity it needs to run, which is usually caused by an internal circuit board fault or a problem with the local power supply.. It appears on 9 Worcester Bosch models in our database.

Technical description: Low mains voltage – the voltage may be interrupted, inconsistent or heat control module (HCM) invalid

Typical repair cost £180-£450 (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 A8 362 fault code

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

Source

Worcester Bosch A8 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