BoilerFaultCodesPotterton Boiler Safety Overheat neon Fault Code
Also written as BOILERSAFETYOVERHEATNEON — same fault.
The Potterton Boiler Safety Overheat neon fault code means: your boiler has switched itself off because it has become too hot to operate safely.. It appears on 1 Potterton model in our database.
Technical description: The boiler is fitted with an additional safety device, which shuts down the boiler in the event of the system or the boiler overheating. If the device operates, the Boiler Safety Overheat neon will illuminate and the boiler will shut down.
What causes the Potterton Boiler Safety Overheat neon fault?
This fault occurs when the water inside the boiler reaches an unsafe temperature, triggering a safety switch to prevent damage. The most common reasons are a failed pump stopping water from circulating or a build-up of sludge and debris blocking the internal pipework. It can also be caused by a faulty internal sensor incorrectly reading the temperature.
This issue often surfaces during the first cold spell of autumn when the heating is turned back on after being idle all summer, which can cause the pump to seize.
DIY fix possible
Turn the boiler off and allow it to cool down for at least 30 minutes.Ensure all radiator valves are open and there is no air trapped in the system.Unscrew the small black cap on the front control panel and press the reset button firmly.
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Gas Safe Register →Potterton models that show the Boiler Safety Overheat neon fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Boiler Safety Overheat 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