How much does it cost to fix Worcester Bosch error code 241 / D1?

Typical repair cost for the Worcester Bosch 241 / D1 fault is £120-220 including labour.

241 / D1 High

Worcester Bosch 241 / D1 Fault Code

Q: What does the Worcester Bosch 241 / D1 fault code mean?

Your boiler has lost its connection to a temperature sensor and is unable to accurately measure the water returning to it, so it has shut down as a precaution to prevent overheating.

Also written as 241D1 — same fault.

The Worcester Bosch 241 / D1 fault code means: your boiler has lost its connection to a temperature sensor and is unable to accurately measure the water returning to it, so it has shut down as a precaution to prevent overheating.. It appears on 2 Worcester Bosch models in our database.

Technical description: Return sensor disconnected

Typical repair cost £120-220 (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 241 / D1 fault code

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

Source

Worcester Bosch 241 / D1 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