How much does it cost to fix Worcester Bosch error code No code?

Typical repair cost for the Worcester Bosch No code fault is £120-250 including labour.

No code High

Worcester Bosch No code Fault Code

Q: What does the Worcester Bosch No code fault code mean?

Your boiler has shut down because it is overheating, likely because water is trapped inside it or the pressure is too low to circulate properly.

Also written as NOCODE — same fault.

The Worcester Bosch No code fault code means: your boiler has shut down because it is overheating, likely because water is trapped inside it or the pressure is too low to circulate properly.. It appears on 6 Worcester Bosch models in our database.

Technical description: Safety or flow temperature rises too high. Air lock or reduced water content.

Typical repair cost £120-250 (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 No code fault code

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

Source

Worcester Bosch No code 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