BoilerFaultCodesPotterton Sensor Fault Neon Fault Code
Also written as SENSORFAULTNEON — same fault.
The Potterton Sensor Fault Neon fault code means: your boiler's internal thermometers are struggling to read the temperature correctly, which is preventing it from heating your home or water safely.. It appears on 1 Potterton model in our database.
Technical description: A fault on the hot water or central heating temperature sensor is indicated.
What causes the Potterton Sensor Fault Neon fault?
This fault occurs when the sensors that monitor water temperature fail to send a clear signal to the boiler’s main control board. The most common reason is that the internal components of the sensor have degraded over time or developed a lime-scale coating, preventing them from providing an accurate reading. In some cases, the electrical wiring connecting these sensors has become loose or damaged, leading to an instant safety shutdown.
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 Sensor Fault Neon fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Sensor Fault Neon 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