Flashing Green Low

Potterton Flashing Green Fault Code

Also written as FLASHINGGREEN — same fault.

The Potterton Flashing Green fault code means: your boiler is working exactly as it should and is currently waiting for a signal from your thermostat or timer to start heating your home.. It appears on 2 Potterton 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: Indicates a call for heat to the user

DIY fix possible

Check that your room thermostat is set to a temperature higher than the current room temperatureEnsure your heating programmer or timer is set to the 'On' or 'Timed' positionConfirm that your hot water programme is also switched on, as this may be required for the boiler to fire

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Potterton models that show the Flashing Green fault code

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

Source

Potterton Flashing Green fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

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