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Error Code 4-6

Safety Sensors Obstructed or Not Aligned

Error Description

Users will experience Error Code 4-6 when the operator detects that the safety sensors are blocked or not aligned when trying to close the door.  


How to Fix

Ensure the safety sensors are properly aligned. 


View a Help Video

How to Align the Safety Reversing Sensors on Your LiftMaster Garage Door Opener

This video demonstrates how to align the safety reversing sensors on your LiftMaster garage door opener.


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How to Align the Safety Reversing Sensors on Your Chamberlain Garage Door Opener

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Error Code 4-6 | Chamberlain Group