How much does it cost to fix Worcester Bosch error code Flame does not persist?

Typical repair cost for the Worcester Bosch Flame does not persist fault is £120-250 including labour.

Flame does not persist High

Worcester Bosch Flame does not persist Fault Code

Q: What does the Worcester Bosch Flame does not persist fault code mean?

Your boiler safely shut itself off because it could not keep the flame lit to heat your water and radiators.

Also written as FLAMEDOESNOTPERSIST — same fault.

The Worcester Bosch Flame does not persist fault code means: your boiler safely shut itself off because it could not keep the flame lit to heat your water and radiators.. It appears on 1 Worcester Bosch model in our database.

Technical description: Reverse live/neutral polarity, faulty sense electrode, or dirty burner ports

Typical repair cost £120-250 (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 Flame does not persist fault code

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

Greenstar 15i System Repair: £120-250

Source

Worcester Bosch Flame does not persist 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