BoilerFaultCodesPotterton E317 Fault Code
The Potterton E317 fault code means: your boiler has detected an issue with the electrical frequency coming from the mains power supply or a fault within its internal control board.. It appears on 2 Potterton models in our database.
Technical description: Wrong power supply (HZ)
What causes the Potterton E317 fault?
This fault occurs when the boiler's internal computer detects that the electrical supply timing, known as frequency, does not match the required UK standard. This is usually caused by a glitch in the local power grid or a malfunctioning control board inside the boiler that can no longer process the incoming electricity correctly. In rare cases, using a backup generator or an unstable power source can also trigger this 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 E317 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E317 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