3 High

Potterton 3 Fault Code

The Potterton 3 fault code means: your boiler is trying to start up or keep running, but the flame keeps going out.. It appears on 5 Potterton models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Green Light Flashing: Flame Loss / Red Light Flashing: Ignition Fault
Typical repair cost £100-£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 3 fault code

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

Source

Potterton 3 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 31 August 2026