How much does it cost to fix Worcester Bosch error code 223?

Typical repair cost for the Worcester Bosch 223 fault is £120-200 including labour.

223 High

Worcester Bosch 223 Fault Code

Q: What does the Worcester Bosch 223 fault code mean?

Your boiler has lost the connection to one of its temperature sensors, meaning it cannot accurately measure how hot the water is and has stopped working as a safety precaution.

The Worcester Bosch 223 fault code means: your boiler has lost the connection to one of its temperature sensors, meaning it cannot accurately measure how hot the water is and has stopped working as a safety precaution.. It appears on 3 Worcester Bosch models in our database.

Technical description: Interruption of the NTC cabling

What causes the Worcester Bosch 223 fault?

Sensor connection fault

Typical repair cost £120-200 (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 223 fault code

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

Source

Worcester Bosch 223 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