BoilerFaultCodesWhat the manual says
Manufacturer manualTemporary fault code (Refer to section 7.10)
From this model's manual
Verified against the Vokera Easi Heat I Combi installation & service manual.
What causes this fault?
This fault occurs when the boiler's control board fails to receive a consistent signal from the internal temperature sensors. The most common reason is a malfunctioning sensor that provides an incorrect reading, though it can also be caused by a loose wiring connection or a developing fault on the main circuit board.
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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