Install The Door Sensor - LiftMaster SMART GARAGE 821LMB Guia De Inicio Rapido

INSTALL

2. Install the Door Sensor

• Remove the pull tab from the sensor to
activate the battery.
• Install the door sensor on the top panel
of the garage door using the fastening
strips or provided hardware.
TIP: Test your door sensor every 6 months or
if the MyQ system is not working as expected.
• Press the test BUTTON on the door
sensor, the LED on the door sensor should
fl ash and the Wi-Fi Hub should beep.
• Perform this test 6 times. If the LED
doesn't fl ash or the Wi-Fi Hub doesn't
beep each time, replace the battery in the
door sensor with a CR2450 battery.
Door Sensor
"TOP" MUST
always face UP
LED
Test
BUTTON
OR
Screws
CR2450 Battery
Fastening
Strips