39
DIAGNOSTIC CODE SYMPTOM SOLUTION
Up Arrow Flash
(es)
Down Arrow Flash
(es)
4 1-4
Door is moving stops or reverses. Manuallyopen and close the door. Check for binding or obstructions,such as a broken spring or door lock,
correctas needed. Ifthe door is binding or sticking contact a trained door systemstechnician. If door is not
binding or sticking attempt to reprogram travel (refer to page 29).
4 5
Opener runs approximately 6-8",stops and reverses. Communication error to travel module. Check travel module connections,replace travel 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 notflickering. Make sure nothing ishanging or mounted on the door that would interruptthe
sensor’s path while closing.
The garage door opener can beep for several reasons:
l Garage door opener has been activated through a device or feature such as Timer-to-Close or
garage door monitor, see page 32.
My remote control will not activate the garage door:
l Verify the lock feature is not activated on the door control.
l Reprogram the remote control.
l If the remote control will still notactivate the door check the diagnosticcodes to ensure the garage
door opener is working properly.
My door will not close and the light bulbs blink on my motorunit:
The safetyreversing sensor mustbe connected and aligned correctlybefore the garage door opener will
move in the down direction.
l Verify the safetysensors 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 lighton when the safetyreversing
sensors have been obstructed. These featurescan be disabled using the door control, see page 33.
My neighbor’s remote control opens my garage door:
Erase the memory from your garage door opener and reprogram the remote control(s).
My vehicle's Homelink
®
is not programming to my garage door opener:
CompatabilityBridge
TM
(notincluded) may be necessary for certain vehicles.Visit
bridge.chamberlain.com to find outifa Bridge is needed.
Troubleshooting
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