What does the Worcester Bosch 2974 fault code mean?

Your boiler has detected an internal software or processing error that is preventing it from operating correctly.

How much does it cost to fix Worcester Bosch error code 2974?

Typical repair cost for the Worcester Bosch 2974 fault is £200-400 including labour.

Manufacturer manual

Internal fault

From this model's manual

Verified against the Worcester Bosch/Worcester Bosch 2000 Gc2000iw 2019 installation & service manual, page 88.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like 2974: no call-out fees, no surprise bills.

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Break-even maths on monthly cover.

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