36
DIAGNOSTIC CODE
SYMPTOM
SOLUTION
Up Arrow
Flash(es)
Down Arrow
Flash(es)
4
1-4
Door is moving stops and or reverses.
Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock,
correct as needed. If the door is binding or sticking contact a trained door systems technician. If door is not
binding or sticking attempt to reprogram travel (refer to page 24 ).
4
5
Opener runs approximately 6-8", stops and reverses. Communication error to travel module. Check travel module connections, replace module if necessary.
4
6
The garage door opener will not close and the light
bulbs flash.
Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LEDs
are steady and not flickering. Make sure nothing is hanging or mounted on the door that would interrupt
the sensor's path while closing.
The garage door opener can beep for several reasons:
•
(If applicable) Operating on battery power or the 12 Vdc battery needs to be replaced,
see page 27.
•
Garage door opener has been activated through a device or feature such as Timer-to-
Close, garage door monitor or LiftMaster Internet Gateway, see page 29.
My remote control will not activate the garage door:
•
Verify the lock feature is not activated on the door control.
•
Reprogram the remote control.
•
If the remote control will still not activate the door check the diagnostic codes to ensure
the garage door opener is working properly.
My door will not close and the light bulbs blink on my motor unit:
The safety reversing sensor must be connected and aligned correctly before the garage
door opener will move in the down direction.
•
Verify the safety sensors are properly installed, aligned and free of any obstructions.
My garage door opener light(s) will not turn off when the door is open:
The garage door opener is equipped with a feature that turns the light on when the safety reversing sensors
have been obstructed or when the motion sensor on the door control detects movement in the garage. These
features can be disabled using the door control, see page 31 .
My neighbor’s remote control opens my garage door:
Erase the memory from your garage door opener and reprogram the remote control(s).
The LEDs on the door control blink:
If you have a Smart Control Panel installed and the TTC is set to a custom time, press the ON button on the
Premium Motion-Detecting Control Panel to set the time properly.
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.
Troubleshooting
