How much does it cost to fix Worcester Bosch error code 17?

Typical repair cost for the Worcester Bosch 17 fault is £90-250 including labour.

17 High

Worcester Bosch 17 Fault Code

Q: What does the Worcester Bosch 17 fault code mean?

Your boiler has reached an unsafe temperature and has shut itself down to prevent damage.

The Worcester Bosch 17 fault code means: your boiler has reached an unsafe temperature and has shut itself down to prevent damage.. It appears on 1 Worcester Bosch model in our database.

Technical description: High limit stat

Typical repair cost £90-250 (including labour)

DIY fix possible

Check that all radiator valves are fully open to allow water to circulate.Ensure there is enough pressure in the system by checking the pressure gauge (should be between 1 and 1.5 bar).Press the 'Reset' button on the front of the boiler and hold it for five seconds.

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Worcester Bosch models that show the 17 fault code

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

Greenstar i Junior Repair: £90-250

Source

Worcester Bosch 17 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