Using this Chef rangehood switch is a breeze. For the light, simply move the 2 - position slide switch to turn it on or off. To adjust the fan speed, use the 4 - position slide switch to choose the level you need. When installing, make sure to disconnect the power first to avoid any electrical hazards. During maintenance, keep the switch clean by using a dry cloth to wipe off any dust. If you notice any problems, like the switch not working properly, don't try to fix it yourself. Instead, contact our customer service. With proper use and care, this switch will serve you well for a long time.