How much does it cost to fix boiler error code Reversed Polarity?

Typical repair cost for the boiler Reversed Polarity fault is £90-150 including labour.

Reversed Polarity High

Boiler Fault Code Reversed Polarity

Also written as REVERSEDPOLARITY — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Reversed Polarity appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the electrical supply wires have been connected in the wrong order, which means it cannot safely operate until the wiring is corrected. (As reported on Potterton Ultra 2 30 DV)

Pick your boiler brand for the Reversed Polarity fix

Potterton Reversed Polarity 2 models

Source

Information for the Reversed Polarity fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026