Home » LiftMaster » Garage Door Openers » LiftMaster 3850

LiftMaster 3850 Support Question

Find answers below for this question about LiftMaster 3850.
Need a LiftMaster 3850 manual? We have 1 online manual for this item!

LiftMaster Overview Questions Manuals Reviews Videos Research

Question posted by mik7agrawa on January 23rd, 2014

How Do I Replace The Back Up Battery On The Liftmaster 3850 Garage Door Opener

The person who posted this question about this LiftMaster product did not include a detailed explanation. Please use the "Request More Information" button to the right if more details would help you to answer this question.

I Know the Answer!

I have the same question
Request More Information

Current Answers

There are currently no answers that have been posted for this question.
Be the first to post an answer!

Remember that you can earn up to 1,100 points for every answer you submit. The better the quality of your answer, the better chance it has to be accepted.

Related LiftMaster 3850 Manual Pages

3850 Elite Series Manual - Page 1

...; GARAGE DOOR OPENER Models 3850 3850-267 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com patible with See Page 29 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installation. ■ The door...

3850 Elite Series Manual - Page 2

... the Protector System 25 Operation 26-33 Operation safety instructions 26 Using garage door opener 26 Using the wall-mounted door control 27 Using the remote control 28 Troubleshooting 28 The remote control battery 28 EverCharge® Standby Power System (optional 29 To open the door manually 30 Care of serious injury or death if you do...

3850 Elite Series Manual - Page 3

... BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid malfunction and damage. Sectional Door One-Piece Door Tools needed During assembly, installation and adjustment of balance. If your garage door is balanced and is out of the opener, instructions will call a trained door systems technician if garage door binds, sticks, or is not...

3850 Elite Series Manual - Page 5

Carton Inventory Your garage door opener is packaged in the foam. LOCK LIGHT SLmCaDrtMCootniotrnolDPeatencetli®ng Door Control Console SECURITY✚® 3-Button Remote Control Models 3850 (1) 3850-267 (2) SECURITY✚® Keyless Entry Model 3850-267 (1) ONLY Motor Unit with Light Lenses 2-Conductor Bell Wire White & White/Red Belt Pulley Bracket Trolley Optional ...

3850 Elite Series Manual - Page 6

...a screwdriver tip into the motor unit. To avoid SERIOUS damage to opener, ONLY use any other bolts will cause serious damage to door opener. • Position belt over belt pulley. Figure 1 Trolley Nut Ring... the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted on ...

3850 Elite Series Manual - Page 7

... next to fingers from electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. 7 To avoid possible SERIOUS INJURY to garage door control. 11. An improperly balanced door may not reverse when required and could be made by a trained door systems technician BEFORE installing opener. 4. They could result in plain view on properly...

3850 Elite Series Manual - Page 11

... top of the motor unit. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to determine the correct mounting height from ceiling. 11 ENGAGED Trolley Release Arm RELEASED ONE-PIECE DOOR WITHOUT TRACK • With the door fully open and parallel to the floor, measure the distance from...

3850 Elite Series Manual - Page 12

Measure the distance from a falling garage door opener, fasten it SECURELY to a support with rail grease. Cut both pieces of the rail surface where the trolley slides with 5/16"-18x1-7/8" lag screws. 5. Check to make sure the rail is not centered above the door). 7. If the door hits the rail, raise the header bracket. 8. FINISHED CEILING...

3850 Elite Series Manual - Page 13

...,wpiurseh, in several places. DO NOT overtighten. • Replace cover by color: white wire to the W (2) and white/red wire to secure wire in tabpwusithhisnctraebwwdritivher tip screwdriver tip Antenna Red White Grey Red White Grey 13 The trolley will not return to each garage door opener. Strip 7/16" (11 mm) of insulation from electrocution...

3850 Elite Series Manual - Page 14

...remain lit for replacement. Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs for ... open position. Channel Battery Battery Cover INSTALLATION STEP 8 Install the Lights • Press the release tabs on battery. • Verify the battery wires are seated in the channel. • Replace battery...

3850 Elite Series Manual - Page 15

... this time. To make it is grounded. To avoid installation difficulties, do not run the opener at least 1" (2.5 cm) from electrocution or fire: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. PERMANENT WIRING CONNECTION Ground Tab...

3850 Elite Series Manual - Page 16

... long as the wall framing. INSTALLATION STEP 11 Install The Protector System® The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the path of its electronic beam. This required safety device MUST NOT be disabled. • Install the safety reversing sensor so beam...

3850 Elite Series Manual - Page 24

... force adjustments to compensate for the force to be set properly. The LED will interfere with proper operation of force required to open (UP). 4. If the garage door opener cannot open and close the door (DOWN). Push the purple button twice to close the door fully, inspect the door to ensure that it , repeat Program the Travel Limits.

3850 Elite Series Manual - Page 25

... on the obstruction, it is not traveling far enough in the down direction. The garage door opener will flash. Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. Door MUST reverse on contact with 1-1/2" high (3.8 cm) object (or 2x4 laid flat) on the floor. 1-1/2" (3.8 cm...

3850 Elite Series Manual - Page 26

... blink for 10 seconds, until the light goes off, then on when someone walks through the open garage door. If the sensor is not installed, or is misaligned, the door won't close the door with each use handle to pull garage door open position, it can close from a hand-held remote control have been factory-set to eight...

3850 Elite Series Manual - Page 31

... opener by pulling the Emergency Release Rope. • Manually bring the door to a closed position. • Loosen the belt by a beep sounding every 30 seconds, replace the battery....garage door opener beeps: • A solid LED with beep, sounding approximately every 2 seconds, indicates the motor unit is activating the door and is operating off when door is open: • The garage door opener ...

3850 Elite Series Manual - Page 32

... or Diagnostic LED "Learn" Button Installed Safety Reversing Sensor Your garage door opener is programmed with jumper wire. The "Learn" button/diagnostic LED will flash a number of the Indicator lights on the safety reversing sensors do not light, replace the safety reversing sensors. 3 FLASHES Door control or wire shorted. 4 FLASHES Safety reversing sensors slightly misaligned...

3850 Elite Series Manual - Page 34

... the button on the hand-held remote control. PROGRAMMING NOTICE: If this Security✚® garage door opener is factory programmed to confirm Learn Mode. 3. Your garage door opener has already been programmed at the factory to operate other Security✚® garage door openers. 34 USING THE "LEARN" BUTTON To Add or Reprogram a Hand-held remote that technical...

3850 Elite Series Manual - Page 35

...Release the # button. 2. It can be closed by pressing the four buttons for your garage door opener. To set a temporary PIN You may be changed by one button close feature has been... person without using a ladder. 1. To activate or deactivate this temporary PIN will no longer open the door. Press and release the "learn indicator light will blink three times. LOCK LIGHT 3. The ...

3850 Elite Series Manual - Page 38

... Remote Control with model 3850 only. Surge Protector: The Garage Door Opener Surge Protector is open garage door manually from outside by disengaging...Door Control: Push bar, light feature and auxiliary button. Includes battery. Enables homeowner to open or closed. Tells you if your home! Laser Park Assist: Laser enables homeowners to protect LiftMaster® garage door openers...