How to Set a Tower Fan Timer for Sleep

By Lasko: #1 Fan & Heater Brand in the USA | Fans, Heaters, Air | Published: 2026-10-31

Category: How-to Guides

Learn how to program a tower fan timer for sleep, including step-by-step instructions, common mistakes, and tips for using a Lasko Ascend DC tower fan.

Quick answer

Set a tower fan timer for sleep by pressing the Timer button on the remote or control panel, then use the up/down arrows to choose 1–12 hours. The fan will run for that duration and then shut off automatically.

Why use a timer for sleep

A sleep timer lets the fan run long enough to cool the room before you fall asleep, then turns off so you don't wake up cold or with dry air blowing on you all night. It also saves energy and reduces noise after you're asleep.

Common mistakes to avoid

One frequent error is pressing the Timer button and then waiting for the fan to shut off immediately. The timer only starts counting down after you set the hours, not when you press the button. Another mistake is setting the timer and then adjusting the speed or mode, which can reset the timer on some models.

Steps to program the sleep timer

Turn on the fan: Press the Power button on the control panel or remote to start the fan. Choose your desired speed and oscillation setting first. Don't set the timer before you turn on the fan—it won't start counting down until the fan is running.
Press the Timer button: Locate the Timer button on the remote or the fan body. Press it once. The display will show a timer icon or a blinking number (usually 0 or 1 hour). If you press the Timer button twice quickly, you might skip past the setting screen. Press it once and wait for the display to respond.
Set the desired hours: Use the up/down arrow buttons to increase or decrease the timer duration. Most tower fans, including the Lasko Ascend, allow 1 to 12 hours in 1-hour increments. A common mistake is pressing the arrows too fast, which can skip past your target hour. Press slowly and watch the display.
Confirm and wait: After setting the hours, stop pressing buttons. The fan will beep or flash the display to confirm the timer is active. The fan will run for that many hours and then shut off automatically. If you change the speed or mode after setting the timer, check the display to ensure the timer is still counting down—it may reset on some models.
Test the timer: To verify the timer is working, set it to 1 hour and note the time. Check back after 1 hour to confirm the fan turned off. This is especially useful the first time you use the sleep timer. If the fan doesn't turn off after the set time, try resetting the timer by turning the fan off and on, then repeating the steps.

Product facts

Lasko Ascend 36" DC Tower Fan: Oscillating, 12-Speed, Remote, Timer, Black: The Lasko Ascend 36-inch DC Tower Fan has a 12-hour programmable timer and 12 speeds, including a sleep mode. You can set the timer to match your sleep schedule and rely on the fan to turn off after you're asleep, without needing to wake up to do it manually.
Lasko Ascend 36" DC Tower Fan: Oscillating, 12-Speed, Remote, Timer, Black