How much does it cost to fix Worcester Bosch error code 4-E2?

Typical repair cost for the Worcester Bosch 4-E2 fault is £120-£210 including labour.

4-E2 High

Worcester Bosch 4-E2 Fault Code

Q: What does the Worcester Bosch 4-E2 fault code mean?

Your boiler has detected a tempereature sensor reading that is outside of its normal range, likely due to a faulty sensor or a communication error between parts.

Also written as 4E2 — same fault.

The Worcester Bosch 4-E2 fault code means: your boiler has detected a tempereature sensor reading that is outside of its normal range, likely due to a faulty sensor or a communication error between parts.. It appears on 1 Worcester Bosch model in our database.

Technical description: Unit of temperature.

Typical repair cost £120-£210 (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 4-E2 fault code

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

Greenstar 2000 Repair: £120-£210

Source

Worcester Bosch 4-E2 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