How much does it cost to fix Grant error code GREEN blinking?

Typical repair cost for the Grant GREEN blinking fault is £120-220 including labour.

GREEN blinking High

Grant GREEN blinking Fault Code

Q: What does the Grant GREEN blinking fault code mean?

Your boiler is struggling to light itself correctly because the internal firing mechanism is becoming partially blocked or worn out.

Also written as GREENBLINKING — same fault.

The Grant GREEN blinking fault code means: your boiler is struggling to light itself correctly because the internal firing mechanism is becoming partially blocked or worn out.. It appears on 5 Grant models in our database.

Technical description: Burner starts with an ignition delay. The ignition electrodes are wrongly positioned; Air output is too high; Nozzle dirty or worn.

Typical repair cost £120-220 (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 GREEN blinking fault code

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

Source

Grant GREEN blinking 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