Reversed Polarity 'Off' Low

Potterton Reversed Polarity 'Off' Fault Code

Also written as REVERSEDPOLARITYOFF — same fault.

The Potterton Reversed Polarity 'Off' fault code means: your boiler is operating correctly and is safely detecting that it is wired into your home's electrical supply the right way around.. It appears on 2 Potterton models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Part of correct ignition sequence: Indicates the electrical polarity is correct. If 'On', polarity is reversed.

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 Reversed Polarity 'Off' fault code

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

Source

Potterton Reversed Polarity 'Off' 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