How much does it cost to fix Potterton error code Green light flashing slowly?

Typical repair cost for the Potterton Green light flashing slowly fault is £120-250 including labour.

Green light flashing slowly High

Potterton Green light flashing slowly Fault Code

Q: What does the Potterton Green light flashing slowly fault code mean?

Your boiler is currently waiting for a signal from your heating controls, meaning it does not know that you want the heating or hot water turned on.

Also written as GREENLIGHTFLASHINGSLOWLY — same fault.

The Potterton Green light flashing slowly fault code means: your boiler is currently waiting for a signal from your heating controls, meaning it does not know that you want the heating or hot water turned on.. It appears on 6 Potterton models in our database.

Technical description: No switch live demand to the boiler

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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Potterton models that show the Green light flashing slowly fault code

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

Source

Potterton Green light flashing slowly 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