How to Guide

TROUBLESHOOTING
DIAGNOSTIC CHART
Your garage door opener is programmed with self-diagnostic capabilities. The UP and DOWN arrows on the garage door opener flash the diagnostic codes.
UP ARROW
FLASH(ES)
DOWN ARROW
FLASH(ES)
SYMPTOM SOLUTION
1 1
The garage door opener will not close
and the light bulbs flash.
Safety reversing sensors are not installed, connected, or wires may be cut. Inspect sensor wires for a disconnected or cut
wire.
1 2
The garage door opener will not close
and the light bulbs flash.
There is a short or reversed wire for the safety reversing sensors. Inspect safety sensor wire at all staple and connection
points, replace wire or correct as needed.
1 3
The door control will not function. The wires for the door control are shorted or the door control is faulty. Inspect door control wires at all staple and
connection points, replace wire or correct as needed.
1 4
The garage door opener will not close
and the light bulbs flash.
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.
1 5
Door moves 6-8" (15-20 cm) stops or
reverses.
Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as
needed. Check wiring connections at travel module and at the logic board. Replace travel module if necessary.
No movement, only a single click. Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as
needed. Replace logic board if necessary.
Opener hums for 1-2 seconds no
movement.
Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as
needed. Replace motor if necessary.
1 6
Door coasts after it has come to a
complete stop.
Program travel to coasting position or have door balanced by a trained door systems technician.
2 1-5
No movement, or sound. Replace logic board.
3 2
Unable to set the travel or retain
position.
Check travel module for proper assembly, replace if necessary.
3 3
The battery status LED is constantly
flashing green.
Battery backup charging circuit error, replace the logic board.
4 1-4
Door is moving, stops or reverses.
Opener beeps and lights flash.
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 29).
4 5
Opener runs approximately 6-8" (15-
20 cm), 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 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.
These are additional troubleshooting issues that will not show up in the diagnostic codes:
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.
Cannot connect garage door opener to home Wi-Fi network:
• Ensure the CRAFTSMAN serial number was entered correctly and try again. The
CRAFTSMAN serial number uses the characters A-F and 0-9 only.
• If your black adjustment button is not solid green go to
support.chamberlaingroup.com.
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).
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