How much does it cost to fix Worcester Bosch error code E9 210?

Typical repair cost for the Worcester Bosch E9 210 fault is £140-£320 including labour.

E9 210 High

Worcester Bosch E9 210 Fault Code

Q: What does the Worcester Bosch E9 210 fault code mean?

Your boiler has shut down because it detected that the exhaust gases are getting too hot, which is a safety mechanism to prevent damage to the internal components.

Also written as E9210 — same fault.

The Worcester Bosch E9 210 fault code means: your boiler has shut down because it detected that the exhaust gases are getting too hot, which is a safety mechanism to prevent damage to the internal components.. It appears on 9 Worcester Bosch models in our database.

Technical description: The temperature measured by the flue gas sensor is too high and is open

Typical repair cost £140-£320 (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 E9 210 fault code

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

Source

Worcester Bosch E9 210 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