How much does it cost to fix Worcester Bosch error code 4-F2?

Typical repair cost for the Worcester Bosch 4-F2 fault is £100-280 including labour.

4-F2 High

Worcester Bosch 4-F2 Fault Code

Q: What does the Worcester Bosch 4-F2 fault code mean?

Your boiler has likely overheated, causing it to shut down as a safety precaution to prevent damage.

Also written as 4F2 — same fault.

The Worcester Bosch 4-F2 fault code means: your boiler has likely overheated, causing it to shut down as a safety precaution to prevent damage.. It appears on 1 Worcester Bosch model in our database.

Technical description: Reset the fault display: YES: fault is reset, NO: fault is retained.

Typical repair cost £100-280 (including labour)

DIY fix possible

Check that your radiator valves are open to allow water to flow.Check the boiler pressure gauge and top up to 1.5 bar if it is too low.Press and hold the 'Reset' button on the front of the boiler for three seconds.

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Worcester Bosch models that show the 4-F2 fault code

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

Greenstar 2000 Repair: £100-280

Source

Worcester Bosch 4-F2 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