BoilerFaultCodesWhat the manual says
Manufacturer manualFlame detected even though boiler switched off.
From this model's manual
Verified against the Worcester Bosch Greenstar Ri installation & service manual.
What causes this fault?
This fault occurs when the boiler's internal sensor continues to detect a flame signal even after the gas valve has been closed. The most common reason is a sensor that has become contaminated or damaged, or a electrical fault in the control board that incorrectly interprets background electrical 'noise' as a live flame.
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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