How much does it cost to fix Worcester Bosch error code 271 D4?

Typical repair cost for the Worcester Bosch 271 D4 fault is £150-300 including labour.

271 D4 High

Worcester Bosch 271 D4 Fault Code

Q: What does the Worcester Bosch 271 D4 fault code mean?

Your boiler has detected that the water is getting much hotter in one part of the system than another, so it has safely shut itself down to prevent overheating.

Also written as 271D4 — same fault.

The Worcester Bosch 271 D4 fault code means: your boiler has detected that the water is getting much hotter in one part of the system than another, so it has safely shut itself down to prevent overheating.. It appears on 3 Worcester Bosch models in our database.

Technical description: Temperature difference between flow and safety sensor exceeding limit

Typical repair cost £150-300 (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 271 D4 fault code

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

Source

Worcester Bosch 271 D4 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