Humidifier shows F3 and stops; fan may not run.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Blocked fan, Failed fan motor, Loose fan connector, Faulty fan driver on PCB

Safety: Unplug the humidifier before working near the fan.

Steps:

Check for obstructions: Remove the cover and inspect the fan for dust buildup or foreign objects.
Spin test: Rotate the fan by hand to ensure it moves freely.
Inspect wiring: Confirm the fan motor connector is secure on the control board.
Replace fan motor: If the fan is seized or does not run when powered, replace the fan motor assembly.
PCB diagnosis: If a new fan does not resolve F3, the control board may need replacement.

Medium 3/5

Fan Motor Assembly

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