| Number of blinks |
Problems |
Solutions |
| UP ARROW |
DOWN
ARROW |
| 1 |
1 |
The opener does not close and the opener’s lights are flashing. |
Photocells (safety sensors) are not installed, not connected or wires may be cut. Inspect sensor wires to see if they are disconnected or cut. |
| 1 |
2 |
The opener does not close and the opener’s lights are flashing. |
Safety sensors wires are shorted or are reversed. Inspect them and correct if needed. |
| 1 |
3 |
The door control does not work. |
Check the door control wires for a short or a reversed wire. Inspect wires, correct the situation, or replace wires if needed. Door control may also be faulty, replace if needed. |
| 1 |
4 |
The opener does not close and the opener’s lights are flashing. |
Photocells are misaligned or obstructed. Realign sensor boxes so that the LED lights are steady and not flashing. If there’s an obstruction in the sensors’ path, clear it. |
| 1 |
5 |
The garage door moves 6 – 8 inches, stops and reverses. |
Open and close the door manually. Check for binding, obstructions, or a broken spring. If equipped with a door lock system, check it. Check wiring connections from the travel module to the logic board. Replace travel module if necessary. |
| No movement, only a single click. |
Open and close the door manually. Check for binding, obstructions, or a broken spring. If equipped with a door lock system, check it. Replace logic board if necessary. |
| The opener hums for 1 to 2 seconds without any movement. |
Open and close the door manually. Check for binding, obstructions, or a broken spring. If equipped with a door lock system, check it. Contact LiftMaster technical support at 1-800-528-9131 |
| 1 |
6 |
The door slides after it has opened and come to a complete stop. |
Reprogram travels to the right position or have a professional adjust the balance of the garage door. |
| 2 |
1 to 5 |
No movement or no sound. |
The logic board must be replaced. |
| 3 |
2 |
Unable to set or keep the settings. |
Check the travel module for a proper assembly. Replace if needed. |
| 3 |
3 |
The battery status LED is constantly flashing. |
Battery not charging, replace battery and/or logic board. |
| 4 |
1 to 4 |
The door is moving, stops and / or reverses for no apparent reason. Opener beeps and lights flash. |
Open and close the door manually. Check for binding or obstructions. If the door is not binding or sticking, reprogram the travel. |
| 4 |
5 |
The garage door moves approximately 6 – 8 inches, stops and reverses. |
There’s a communication error on the travel module. Check the travel module connections. Replace the module if necessary. |
| 4 |
6 |
The opener does not close and the opener’s lights are flashing. |
Photocell (safety beams) are misaligned or obstructed. Realign sensor boxes so that the LED lights are steady and not flashing. If there’s an obstruction in the sensors’ path, clear it. |
