LiftMaster Garage Door Error Code 15: How to Fix It

Q: What does error code 15 mean on a LiftMaster opener?

Error code 15 indicates a door state mismatch: the opener thinks the door is closing but the safety sensors report it's open (or vice versa). It's usually caused by misaligned or obstructed sensors.

Q: How do I reset error code 15 on my LiftMaster?

After realigning sensors, you can reset by holding the 'Learn' button for 6 seconds to clear memory, then follow the two-step process: press and release Learn, then press and release again to recalibrate sensors. Finally, test the door.

Q: Can a LiftMaster error code 15 be caused by bad sensors?

Yes, if sensors are physically damaged or their wiring is broken, they may not communicate properly, triggering error 15. Replacing faulty sensors usually resolves the issue.

Q: Do I need to call a professional for error code 15?

Most error 15 issues are DIY-friendly. Call a pro only if basic sensor alignment and wiring checks don't fix it, as deeper opener component failure may be involved.

Abstract

Error code 15 on your LiftMaster garage door opener means the system detects a mismatch between the door's actual position and what the sensors report. This usually happens when the safety sensors are misaligned, obstructed, or faulty, causing the opener to think the door is in a different state than it actually is.