Craftsman CMXEOCG781 Owner's Manual page 43

TROUBLESHOOTING
UP ARROW DOWN ARROW
FLASH(ES) FLASH(ES)
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These are additional troubleshooting issues that will not show up in the diagnostic codes:
My garage door opener beeps every 30 seconds:
Operating on battery power or the 12 Vdc battery needs to be replaced.
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See page 33.
Garage door opener has been activated through a device such as Timer-
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to-Close or garage door monitor. See page 37.
My remote control will not activate the garage door:
Verify the lock feature is not activated on the door control.
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Reprogram the remote control.
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If the remote control will still not activate the door check the diagnostic
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codes to ensure the garage door opener is working properly.
Ensure both antenna wires are hanging down from the garage door
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opener.
SYMPTOM
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Opener runs approximately 6-8" (15-20
cm), stops and reverses.
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The garage door opener will not close and
the light bulbs flash.
Communication error to travel module. Check travel module connections,
replace travel module if necessary.
Safety reversing 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.
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, refer to the Door Control section.
My neighbor's remote control opens my garage door:
Erase the memory from your garage door opener and reprogram the remote
control(s).
Cannot connect garage door opener to home Wi-Fi n etwork:
Ensure the CRAFTSMAN serial number was entered correctly and try again.
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The CRAFTSMAN serial number uses the characters A-F and 0-9 only.
If your black adjustment button is not solid green go to
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support.chamberlaingroup.com.
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SOLUTION