How much does it cost to fix boiler error code Electrical Supply Fault?

Typical repair cost for the boiler Electrical Supply Fault fault is £120-280 including labour.

Electrical Supply Fault High

Boiler Fault Code Electrical Supply Fault

Also written as ELECTRICALSUPPLYFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Electrical Supply Fault 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 is not receiving the steady electrical voltage it needs to safely fire up and run. (As reported on Potterton Performa SL HE 9 2)

Pick your boiler brand for the Electrical Supply Fault fix

Potterton Electrical Supply Fault 2 models

Source

Information for the Electrical Supply Fault 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