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.
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.
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.
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.
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 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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