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4-Year Home Improvement Protection Plan

from SquareTrade
  • Coverage for product breakdowns and malfunctions
  • 24/7 customer support
  • Free shipping on all repairs with no deductibles or hidden fees
  • Fully transferable with gifts. Cancel anytime, full refund in the first 30 days
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2 Year Asurion Home Improvement Extended Protection Plan

from Asurion, LLC
  • Covers mechanical and electrical breakdowns.
  • No deductibles or hidden fees. Shipping included on all repairs. Fully transferable.
  • Easy claims process online 24/7. If we can't fix it, we will send you an Amazon e-Card reimbursement for your product purchase price.
  • Plan term and coverage begins at the end of the manufacturer's labor warranty. Plan is fully refunded if canceled within 30 days.
  • Plan contract will be emailed from Asurion within 24 hours of purchase. This will not ship with your product.

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Liftmaster/Chamberlain/Sentex 3900 Light Duty Commercial Jackshaft Operator

4.6 out of 5 stars 62 customer reviews

Price: See price in cart
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Only 6 left in stock - order soon.
Ships from and sold by Open Door Discount Remotes.
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  • The 3900 operator designed for light-duty commercial standard, vertical and high-lift sectional doors
  • Maximum recommended duty cycle: 10 cycles per hour
  • Compact design ideal for limited height cathedral or obstructed ceiling installations
  • Heavy-duty 24VDC motor provides ultra-quiet operation
See more product details
1 used from $359.10
Packaging may reveal contents. Choose Conceal Package at checkout.
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Frequently bought together

  • Liftmaster/Chamberlain/Sentex 3900 Light Duty Commercial Jackshaft Operator
  • +
  • Liftmaster 371LM Garage Door Opener Remote
  • +
  • Liftmaster 877max
Total price: $389.00
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  • Buy Used and Save: Buy a Used "Liftmaster/Chamberlain/Sentex 3900 Light Duty Comm..." and save 32% off the $529.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

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Product description

The model 3900 door operator is designed for light-duty commercial sectional applications only. It may be used on standard vertical and 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. Maximum recommended duty cycle: 10 cycles per hour. The 3900 is not compatible with low headroom applications. Top clearance: 3 1/2 " from center of torsion shaft to the top of the operator. Side clearance: 8” minimum required approximately 1 ½” shaft exposed beyond bearing plate required to attach coupler. Unit physical dimensions 16 1/2" L x 7" W x 6 3/4" D. Compact design ideal for limited height cathedral or obstructed ceiling installations. Wall mount installation: Mounts on the left or right side of door and attaches to the door tension bar. Heavy-duty 24VDC motor provides ultra-quiet operation along with variable speed smooth start and stop. UL325 compliant.

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