What is your LiftMaster opener trying to tell you?

When something is wrong, the UP and DOWN arrows on the opener flash a two-number code. Count the flashes of the UP arrow, then the DOWN arrow: three UP flashes and two DOWN flashes is code 3-2.

Look up a LiftMaster code

• Code 1-1The door won’t close because the safety sensors aren’t connectedCheck this first, then a pro
• Code 1-2The door won’t close because a sensor wire is shortedCheck this first, then a pro
• Code 1-3The wall button doesn’t workCheck this first, then a pro
• Code 1-4The door won’t close because the sensors can’t see each other. The manuals give code 4-6 the same meaningYou can check this
• Code 1-5The door stops short, clicks, or hums without movingCall a pro
• Code 1-6The door keeps drifting after it stopsCheck this first, then a pro
• Code 2-1 to 2-5No movement and no soundCall a pro
• Code 3-1The opener moves a little, then stopsCheck this first, then a pro
• Code 3-2The opener can’t learn or keep where the door should stopCall a pro
• Code 3-3The battery light keeps flashing greenCall a pro
• Code 3-5The door won’t close, or it reverses partwayCheck this first, then a pro
• Code 4-1 to 4-4The door starts, then stops or reversesCheck this first, then a pro
• Code 4-5The opener runs a few inches, stops and goes backCall a pro
• Code 4-6The door won’t close because the sensors can’t see each other. The manuals give code 1-4 the same meaningYou can check this
• Code 5-5The door won’t close from the app or on a timerYou can check this

Garage Door Science isn’t affiliated with the opener makers LiftMaster, Chamberlain or Genie. Each meaning is our summary of the maker’s own manual, which we link.