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LiftMaster 3900

LiftMaster 3900 Light-Duty Commercial Jackshaft Operator for Sectional Doors   Light-Duty Commercial Jackshaft Operator for Sectional Doors
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.


  • Motor: 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

Serving The Following Areas: Pierce County, King County, Algona, Auburn, Beaux Arts Village, Bellevue, Black Diamond, Bonny Lake, Bothell, Browns Point, Buckley, Burien, Clyde Hill, Covington, Dash Point, Des Moines, Edgewood, Enumclaw, Fall City, Federal Way, FIfe, Fox Island, Frederickson, Gig Harbor, Hunts Point, Issaquah, Kenmore, Kent, Kirkland, Lake Forest Park, Lakewood, Medina, Maple Valley, Mercer Island, Milton, Newcastle, Normandy Park, North Bend, Pacific, Parkland, Puyallup, Ravensdale, Redmond, Renton, Sammamish, Seatac, Seattle, Shoreline, Skykomish, Snoqualmie Pass, Snoqualmie , Spanaway, Steilacoom, Sumner, Tacoma, Tukwila, University Place, Woodinville, Yarrow Point