High Lockout
E130 on Potterton Promax System HE Plus

Your boiler has sensed that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent damage.

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.

Technical description

Flue NTC Operated (Overheat of the flue system)

What causes this fault?

This fault occurs when a temperature sensor inside the boiler detects that the exhaust gases are becoming dangerously hot, triggering an automatic shutdown to protect the internal components. The most common reasons for this are a build-up of debris or limescale inside the heat exchanger, or damaged insulation panels that are no longer keeping the heat contained where it should be.

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

E110View →

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