ORANGE blinking Low

Grant ORANGE blinking Fault Code

Also written as ORANGEBLINKING — same fault.

The Grant ORANGE blinking fault code means: your boiler is currently just waking up and going through a brief safety check before it ignites the flame to start heating your home.. It appears on 6 Grant models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Pre-purge

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 ORANGE blinking fault code

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

Source

Grant ORANGE 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 7 July 2026