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1/3 HP Chain Drive Garage Door Opener

Dependability combined with reliability is what you'll get with the LiftMaster® 1345/46 1/3 HP Chain Drive Garage Door Opener. Its durable 1/3 HP motor and strong chain drive provide continual steady performance. Part of the Contractor Series, it is the choice for value and reliability.

This model has earned the Good Housekeeping seal.            
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  • The Smart Garage Door Opener® lets you electronically program security codes from a control panel or the powerhead
  • Delivers 75 watts of light with adjustable light time delay
  • Meets all UL325 requirements 


  • The Protector System® safety sensors project an invisible light beam across the garage door opening and automatically reverse the door if anything interrupts the beam while the door is going down
  • Sensing technology will stop the door from closing if contact is made with a person or object
  • Opener light turns on automatically when The Protector System's infrared beam is broken
  • Security+® rolling code technology assures a new code is sent every time the remote control is used
  • Patented PosiLock® system ensures the door remains securely locked when the garage door is closed
  • Manual release handle in case of power failure


  • 2-year motor warranty 
  • 1-year parts warranty

1345 1/3 HP Chain Drive Garage Door Opener:  © The Chamberlain Group, Inc.

Owner's Manuals

373LM 3-Button Remote Control:  © The Chamberlain Group, Inc.

3-Button Remote Control
975LM Laser Parking Accessory:  © The Chamberlain Group, Inc.

Laser Parking Accessory
881LM Motion-Detecting Control Panel with Timer-to-Close:  © The Chamberlain Group, Inc.

Motion-Detecting Control Panel with Timer-to-Close
885LM Wireless Control Panel:  © The Chamberlain Group, Inc.

Wireless Control Panel