High
47 on Alpha Evoke

Your boiler is overheating its exhaust system and has automatically slowed down to prevent damage, but it may stop working entirely if the temperature does not drop.

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

Flue thermostat has sensed high flue gas temperature (110°C) and reduced the burner output to prevent damage. If the temperature continues to rise the boiler will lock out and E03 will be displayed

From this model's manual
Verified against the Alpha/Alpha Evoke installation & service manual, page 48.
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

E03View →

All 51 fault codes on the Evoke

Seeing a different code? Every code this model can display, in one place.

0102030405060810121516202324293137384345516061707576d0d1d2d3d4d5d6d7d8d9d10d12d14d15d16d17d18d19d22E03E12E38E97Sr

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