Humidifier stops and displays F1, fan does not run.

Safety: Unplug the unit before inspection. Sharp plastic edges and moving parts can cause injury.

• Check for blockage: Remove the water tank and any front/rear grilles that are user-removable. Look into the air outlet and inlet for foreign objects (plastic wrap, dust buildup, toys). Remove obstructions carefully.
• Spin the fan: With the unit unplugged, gently spin the fan wheel with a plastic tool or gloved finger. It should rotate freely without scraping. If it is stiff or rubbing, the fan housing may be misaligned or the motor bearing may be failing.
• Clean dust: Use a vacuum with a brush attachment to remove lint and dust from the fan blades and air path. Excess buildup can overload the motor.
• Check fan connector: If you can access the internal components, locate the fan motor connector on the main control PCB and ensure it is fully seated and not burnt.
• If F1 remains: The fan motor assembly or control PCB likely needs replacement. This involves disassembling the housing and transferring wiring; consider professional service.