Liftmaster Model 3900

Light Commercial Garage Door Opener Model 3900.


Light Duty Jackshaft Operator

For light-Duty Commercial Sectional Applications Only

Model 3900 is a light-duty jackshaft operator for light-duty commercial sectional applications only. It features a compact design ideal for limited height, cathedral, or obstructed ceiling installations. It may be used on standard and high-lift (maximum 7 ft. high-lift) sectional doors measuring up to 14 ft. high and up to 18 ft. wide, but not exceeding 180 sq. ft. or 650 lbs.



Heavy-duty 24VDC motor provides ultra-quiet operation, along with variable speed smooth start and stop.

Compact Design

Ideal for limited height, cathedral, or obstructed celing installations; mounts mounts on the left or right side of door and attaches to the torsion bar.

Push Button Station

1-button station for OPEN & CLOSE functions with type B2 control wiring is standard for all operators. Controls with 1, 2 and 3 buttons are available.

The Protector System® Safety Sensors

A "non-contact" photo safety sensor designed to sense an obstruction and signal the door operator to reverse to open.


Lifetime motor warranty.


Power Door Lock

Prevents the door from being manually forced open once fully closed.

EverCharge® Standby Power System

Operates the door operator for up to 20 full cycles within a 24 hour period.

Alternate Mounting Kit

Allows operator to be mounted below the torsion bar.

Remote Work Light

Adds 200 watts of light with adjustable light time delay; unlimited number of lights can be added.

Keyless Entry

Allows door to open or close by using a code programmed directly into the unit.