How much does it cost to fix Worcester Bosch error code 277?

Typical repair cost for the Worcester Bosch 277 fault is £120-300 including labour.

277 High

Worcester Bosch 277 Fault Code

Q: What does the Worcester Bosch 277 fault code mean?

Your boiler has detected that it is getting too hot and has automatically paused to prevent damage, but it requires professional attention to identify why it isn't cooling down properly.

The Worcester Bosch 277 fault code means: your boiler has detected that it is getting too hot and has automatically paused to prevent damage, but it requires professional attention to identify why it isn't cooling down properly.. It appears on 1 Worcester Bosch model in our database.

Technical description: Safety temperature exceeds 95°C Main heat exchanger safety sensor overheat - boiler will wait for the temperature to reduce; if not it becomes a Locking error 219.

Typical repair cost £120-300 (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 277 fault code

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

Greenstar CDi Compact Repair: £120-300

Source

Worcester Bosch 277 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