BoilerFaultCodesWhat the manual says
Manufacturer manualRegulates as if the outside temperature was 0 °C
Shared across the Vitodens 222F FS2B range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
What causes this fault?
This fault occurs when the boiler's internal computer is unable to process the data it receives from its electronic sensors. The most common reason is a component failure on the main circuit board, which prevents the system from accurately measuring how the boiler is burning gas.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 92 fault codes on the Vitodens 222-F
Seeing a different code? Every code this model can display, in one place.