How much does it cost to fix Grant error code Lock-out reset button lit?

Typical repair cost for the Grant Lock-out reset button lit fault is £120-250 including labour.

Lock-out reset button lit High

Grant Lock-out reset button lit Fault Code

Q: What does the Grant Lock-out reset button lit fault code mean?

Your boiler has stopped working because it failed to ignite, causing a safety mechanism to shut the burner down.

Also written as LOCKOUTRESETBUTTONLIT — same fault.

The Grant Lock-out reset button lit fault code means: your boiler has stopped working because it failed to ignite, causing a safety mechanism to shut the burner down.. It appears on 1 Grant model in our database.

Technical description: Burner malfunction. A built-in safety circuit switches the burner off and the Lock-out reset button will light.

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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Grant models that show the Lock-out reset button lit fault code

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

Vortex Combi 70 Repair: £120-250

Source

Grant Lock-out reset button lit fault code information on this page is sourced and cross-checked against the official Grant service / installation manuals for each affected model.

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