BoilerFaultCodesPotterton Power Neon (Flashing) Fault Code
Also written as POWERNEONFLASHING — same fault.
The Potterton Power Neon (Flashing) fault code means: your boiler has detected an issue with how it clears exhaust gases, which has caused the system to shut down for safety.. It appears on 1 Potterton model in our database.
Technical description: Indicates the fan is not operating or the air pressure switch has failed to operate.
What causes the Potterton Power Neon (Flashing) fault?
This fault occurs when the boiler's safety sensors cannot confirm that harmful exhaust gases are being safely blown out of the flue. The most common reason is that the internal fan has seized or the air pressure switch, which acts as a safety gatekeeper, has failed to detect the required airflow. In some cases, a small piece of debris or a perished rubber tube inside the unit is enough to prevent the system from starting.
This issue can be more frequent during periods of high winds, as strong gusts can occasionally create back-pressure in the flue that interferes with the air pressure switch.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Potterton models that show the Power Neon (Flashing) fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Power Neon (Flashing) 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