How much does it cost to fix Grant error code BURNER (FLASHING)?

Typical repair cost for the Grant BURNER (FLASHING) fault is £250-450 including labour.

BURNER (FLASHING) High

Grant BURNER (FLASHING) Fault Code

Q: What does the Grant BURNER (FLASHING) fault code mean?

Your boiler's electronic brain is unable to communicate correctly, which has caused it to lock out to prevent unsafe operation.

Also written as BURNERFLASHING — same fault.

The Grant BURNER (FLASHING) fault code means: your boiler's electronic brain is unable to communicate correctly, which has caused it to lock out to prevent unsafe operation.. It appears on 5 Grant models in our database.

Technical description: Indicates PCB fault.

Typical repair cost £250-450 (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 BURNER (FLASHING) fault code

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

Source

Grant BURNER (FLASHING) 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