How much does it cost to fix Worcester Bosch error code 278 F0?

Typical repair cost for the Worcester Bosch 278 F0 fault is £150-250 including labour.

278 F0 High

Worcester Bosch 278 F0 Fault Code

Q: What does the Worcester Bosch 278 F0 fault code mean?

Your boiler's computer has detected that one of its internal sensors is sending back confusing or missing information, so it has shut down as a precaution to prevent system errors.

Also written as 278F0 — same fault.

The Worcester Bosch 278 F0 fault code means: your boiler's computer has detected that one of its internal sensors is sending back confusing or missing information, so it has shut down as a precaution to prevent system errors.. It appears on 3 Worcester Bosch models in our database.

Technical description: Sensor test failed

Typical repair cost £150-250 (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 278 F0 fault code

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

Source

Worcester Bosch 278 F0 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