How much does it cost to fix Baxi error code Lockout will not reset?

Typical repair cost for the Baxi Lockout will not reset fault is £150-350 including labour.

Lockout will not reset High

Baxi Lockout will not reset Fault Code

Q: What does the Baxi Lockout will not reset fault code mean?

Your boiler has detected that it is dangerously overheated or has run without enough water and will not restart until it has cooled down completely.

Also written as LOCKOUTWILLNOTRESET — same fault.

The Baxi Lockout will not reset fault code means: your boiler has detected that it is dangerously overheated or has run without enough water and will not restart until it has cooled down completely.. It appears on 2 Baxi models in our database.

Technical description: NO LOCKOUT RESET - Flow temperature remains > 60°C, fan ambient temperature > 90°C, or dry-fire lockout condition persists.

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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Baxi models that show the Lockout will not reset fault code

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

Source

Baxi Lockout will not reset fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026