High
Electrical Supply Fault on Potterton Suprima HE

Your boiler is failing to detect the necessary electrical power to operate, which may be caused by a loose wire or an issue with your heating controls.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Boiler requires permanent and switched live minimum 190V. Check system controls and wiring.

From this model's manual
Verified against the Potterton Suprima He System installation & service manual, page 25.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

E119View →E110View →

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