Liftmaster Error Codes

Find troubleshooting guides for all Liftmaster error codes.

11 error codes across 1 appliance types

Garagedoor

Code	Meaning	Severity
1-2	The motor's built-in thermal protector has tripped due to excessive heat from overuse or from working too hard against a binding door. high	high
1-4	The logic board (main control board) inside the motor unit has experienced an internal failure and needs to be replaced. high	high
1-5	A remote control button or keypad key is stuck in the pressed position, or a button was held down too long during a programming attempt. low	low
1-6	The trolley (carriage) has been disconnected from the drive system, or the opener is in a factory default state after a hard reset. moderate	moderate
10 Flashes	Lock Mode is active on the opener. All remote controls and keypads are disabled. Only the wall-mounted door control button works. low	low
4-1	The sensor wires are reversed at the logic board terminals, or there is an open circuit (broken wire) somewhere in the sensor wiring. high	high
4-2	The safety photo eye sensors at the bottom of the door tracks are not properly aligned or something is obstructing the beam between them. high	high
4-3	The door failed to reverse when it should have during a safety reversal test, or the sensitivity is set too high and the reversal force is insufficient. high	high
4-4	An obstruction is blocking the sensor beam path, or the sensor lens is dirty enough to prevent the beam from reaching the receiver. moderate	moderate
4-6	The door has traveled to its limit but the opener cannot confirm it reached the open or close position, or travel limits need to be set or reset. high	high
HUB	Hub page covering all LiftMaster garage door opener LED blink fault codes. low	low