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

Typical repair cost for the Worcester Bosch Intermittent lockout fault is £150-350 including labour.

Intermittent lockout High

Worcester Bosch Intermittent lockout Fault Code

Q: What does the Worcester Bosch Intermittent lockout fault code mean?

Your boiler is struggling to stay lit because it cannot reliably sense the flame or is being affected by outside wind, causing it to turn itself off for safety.

Also written as INTERMITTENTLOCKOUT — same fault.

The Worcester Bosch Intermittent lockout fault code means: your boiler is struggling to stay lit because it cannot reliably sense the flame or is being affected by outside wind, causing it to turn itself off for safety.. It appears on 7 Worcester Bosch models in our database.

Technical description: Bad electrical connection; Intermittent flame detection fault; Down draught

Typical repair cost £150-350 (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 Intermittent lockout fault code

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

Source

Worcester Bosch Intermittent lockout 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