How much does it cost to fix Worcester Bosch error code E5 218?

Typical repair cost for the Worcester Bosch E5 218 fault is £120-£350 including labour.

E5 218 High

Worcester Bosch E5 218 Fault Code

Q: What does the Worcester Bosch E5 218 fault code mean?

Your boiler has stopped running because the water inside has become much too hot, suggesting it isn't moving through the system correctly.

Also written as E5218 — same fault.

The Worcester Bosch E5 218 fault code means: your boiler has stopped running because the water inside has become much too hot, suggesting it isn't moving through the system correctly.. It appears on 10 Worcester Bosch models in our database.

Technical description: Flow temperature too high

Typical repair cost £120-£350 (including labour)

DIY fix possible

Check that your thermostat is not set unnecessarily highEnsure all radiator valves are fully open to allow water to circulateCheck the system pressure gauge and top it up if it is below 1.0 bar

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Worcester Bosch models that show the E5 218 fault code

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

Source

Worcester Bosch E5 218 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