BoilerFaultCodesYour boiler is struggling to manage its internal temperature because the fan is spinning at the wrong speed, likely due to extreme cold or a mechanical issue.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fan frost protection function active – fan speed outside the tolerance values
What causes this fault?
This fault occurs when the boiler's control system detects that the fan is not spinning at the required speed to safely clear exhaust gases. It is often triggered when the fan is physically stuck due to debris or ice, or when the electrical signals between the fan and the main control board are interrupted.
This fault is frequently seen during periods of extreme cold, as the frost protection mode can struggle if the air intake or flue becomes blocked by ice or snow.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like F.32 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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