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Home>>     LiftMater By Drive>>     373P>>     398LM>>     3850 Owner's Manual>>

3850

DC Motor Belt Drive with EverCharge® Standby Power System

Now when the power goes out, your garage door opener will still work. The LiftMaster® 3850 is the only 3/4 HPS®* professionally installed opener with a fully-integrated standby power system. It will operate the garage door opener for 40 cycles within a 24-hour period, and recharges automatically when the power comes back on; an audible signal tells you when the power is out and the EverCharge® Standby Power System is in use. The safety and security features will continue to operate as well, ensuring your family is protected in a power failure. The opener also features smooth start and smooth stop to reduce the noise of the garage door as it opens and closes – perfect for homes with a room above the garage.

* horsepower strength with same lifting force specifications as 3/4 HP LiftMaster garage door openers

  • Auto-force feature constantly monitors garage door system and adjusts forces to temperature fluctuations, floor height, and door track movement 
  • The Smart Garage Door Opener® lets you electronically program security codes from the Smart Control Panel® or the powerhead
  • Enclosed gear case provides continuous lubrication and protection for longer life and smoother operation
  • A 6-foot power cord makes connecting to a power source easier than ever
  • Delivers 200 watts of light with adjustable light time delay
  • Meets all UL325 requirements
LiftMaster Models

Belt Drive

3850
3585
3280



Screw Drive
3240
3130



Chain Drive
3595
3275
3265
3255
3245
1355
1345

Jackshaft
3800

SAFETY & SECURITY FEATURES

  • 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 lights 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

WARRANTY

  • Lifetime motor and belt warranty 
  • 5-year parts warranty
  • 1-year warranty on EverCharge® Standby Power System