Efficient operation depends on the mode you select. Many units include an "Auto" mode that adjusts fan speed based on ambient humidity, and a "Laundry" or "Continuous" mode designed for drying clothes or managing extremely damp basements. If your model has a timer function, use it to schedule operation during off-peak energy hours or to ensure the device shuts off after a specific duration.
Some Finether models require you to press “Set” twice rapidly. If that fails, reset the unit: unplug for 2 minutes, plug back in, and reconfigure. A failing memory capacitor (after 3+ years) may require motherboard replacement.