Maintenance
Every Month
•
Manually operate door. If it is unbalanced or binding, call a
trained door systems technician.
•
Check to be sure door opens and closes fully. Adjust if necessary,
page 1.
•
Test the safety reversal system. Adjust if necessary, page 1.
Every Year
•
Oil door rollers, bearings and hinges. The garage door opener
does not require additional lubrication. Do not grease the door
tracks.
•
(If applicable) Test the battery backup and consider replacing the
battery to ensure the garage door opener will operate during an
electrical power outage.
1.
Unplug the garage door opener from AC power. The battery
status LED will glow solid orange (opener is operating on
battery power) or will flash (low battery power).
2.
Open and close the door using the remote control or door
control.
3.
In battery backup mode, the Automatic Garage Door Lock will
unlock when the garage door is opened, and will remain
disabled until power is restored.
4.
Plug in the garage door opener. Verify the battery status LED
is flashing green (battery is charging).
Every Two to Three Years
•
Use a rag to wipe away the existing grease from the garage door
opener rail. Reapply a small layer of white lithium grease to the
top and underside of the rail surface where the trolley slides.
The Remote Control Battery
To prevent possible SERIOUS INJURY or DEATH:
•
NEVER allow small children near batteries.
•
If battery is swallowed, immediately notify doctor.
To reduce risk of fire, explosion or chemical burn:
•
Replace ONLY with 3V CR2032 coin batteries.
•
DO NOT recharge, disassemble, heat above 212°F (100°C) or
incinerate.
891LM
1
3
2
Replace with
only 3V CR2032
coin cell battery.
Pry open the case first
in the middle (1), then
at each side (2 and 3)
with visor clip.
893LM
1
3
2
Replace with
only 3V CR2032
coin cell battery.
Pry open the case first
in the middle (1), then
at each side (2 and 3)
with visor clip.
Troubleshooting
Below are basic troubleshooting tips, for additional help and support
videos visit support.liftmster.com or contact your installing dealer.
My garage door opener will not close:
Check to make sure the LEDs in both sensors are glowing steadily. The
LEDs in both sensors will glow steadily if they are aligned and wired
correctly. See page 1.
My vehicle’s Homelink® is not programming to my garage door
opener:
Depending on the make, model, and year of your vehicle an external
adapter may be required. Visit www.homelink.com for additional
information.
My garage door opener beeps:
The garage door opener can beep for several reasons:
•
The opener senses an obstruction while traveling.
•
Garage door opener has been activated through a device or
feature such as Timer-to-Close, garage door monitor or LiftMaster
Internet Gateway.
My neighbor’s remote control opens my garage door:
Erase the memory from your garage door opener and reprogram the
remote control(s).
The garage door moves 6-8", stops or reverses:
•
Manually open and close the garage door. Garage door may be
binding or there may be an obstruction. If the door is binding, call
a trained door systems technician.
•
Possible travel module failure.
My remote control will not activate the garage door:
Verify the lock feature is not activated on the door control or
reprogram the remote control.
The wall-mounted door control will not function:
The wires for the door control are shorted or the door control is faulty.
Garage door opener hums for 1-2 seconds with no movement and 5
flashes and 5 beeps occur:
Manually open and close the garage door. Garage door may be binding
or there may be an obstruction. If the door is binding, call a trained
door systems technician.
Cannot connect garage door opener to home Wi-Fi network:
Ensure the myQ® Serial number was entered correctly and try again.
The myQ® characters are between A-F and 0-9 only.
For the complete manual visit LiftMaster.com/Customer-Support.
14
