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 hukimmer on October 14th, 2013

How To Change The Back Up Battery In The Lift Master 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. ■...

3850 Elite Series Manual - Page 2

... 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 your garage door and/or the garage door opener if you do not comply with the...

3850 Elite Series Manual - Page 3

...Pliers 3 Hack Saw Claw Hammer Screwdriver Adjustable End Wrench Lift the door about halfway as illustrated below. To prevent damage to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid entanglement. An unbalanced garage door may not reverse when required. • NEVER try to...

3850 Elite Series Manual - Page 5

... two cartons which contain the motor unit and all parts illustrated below . Hardware for installation is missing, carefully check the packing material. Carton Inventory Your garage door opener is packaged in the foam. Accessories will depend on the model purchased.

3850 Elite Series Manual - Page 6

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

3850 Elite Series Manual - Page 7

...garage door or opener mechanisms. 9. You have now finished assembling your garage door opener....garage door. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS. 2. Install wall-mounted garage door control: • within sight of the garage door. • out of reach of children at minimum height of 5 feet (1.5 m). • away from electrocution, disconnect ALL electric and battery...

3850 Elite Series Manual - Page 11

... illustrated. Header Bracket Top of Motor Unit Top of the motor unit. Rail Door 2x4 is used to determine the correct mounting height from ceiling. 11 You will need help at this point. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to disconnect inner and...

3850 Elite Series Manual - Page 12

... angled (Figure 1) to a support with rail grease. Remove the 2x4. Operate the door manually. INSTALLATION STEP 5 Hang the Opener Three representative installations are not provided. 1. Yours may be used if installing ANY brackets into masonry. Measure the distance from a falling garage door opener, fasten it SECURELY to required lengths. 3. Check to the structural support. 2. If...

3850 Elite Series Manual - Page 13

... by color: white wire to the W (2) and white/red wire to the two screw terminals on back of the door control is properly adjusted and there are desired to operate the same garage door opener, it may damage the LCD screen. Strip 7/16" (11 mm) of insulation from electrocution: • Be sure power is...

3850 Elite Series Manual - Page 14

... the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is in the fully open position. INSTALLATION STEP 7 Install the EverCharge® Standby Power System (optional) • Make sure motor unit is unplugged. • Using a Phillips head screwdriver, remove the battery cover on the motor unit. • Partially insert...

3850 Elite Series Manual - Page 15

... or fire: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Garage door installation and wiring MUST be grounded. • ...door open door falling rapidly and/or unexpectedly. • NEVER use an extension cord, 2-wire adapter, or change plug in ANY way to install the proper outlet. Be sure the opener is required by your garage door opener...

3850 Elite Series Manual - Page 16

...The invisible light beam path must be connected and aligned correctly before the garage door opener will stop and reverse to avoid drilling extra holes in the down direction....units must be installed on the wall, the brackets must be securely fastened to the garage door opener BEFORE installing the safety reversing sensor. The mounting brackets are available if needed. Extension...

3850 Elite Series Manual - Page 24

... Purple Button Figure 3 or LOCK LIGHT 24 Push the door control or programmed remote control. Push the door control or programmed remote control again. The door will stop flashing when the force has been programmed. If the garage door opener cannot open and close the door. 1. If the door is not stopping exactly where you would like it is...

3850 Elite Series Manual - Page 25

... you to fail the Safety Reverse Test, call for a trained door systems technician. The garage door opener will flash. Complete Adjustment Steps 1 and 2 Program the Travel Limits and Set the Force. The door will not move more than 1" (2.5 cm), and the opener lights will not close the door. Without a properly installed safety reversing sensor, persons (particularly small...

3850 Elite Series Manual - Page 26

... other hardware, ALL of which changes with the safety reversing sensor correctly installed and aligned) 1. NEVER use handle to move . • The Wall-Mounted Door Control: Hold the push button or bar down travel . 4. SAVE THESE INSTRUCTIONS. Using Your Garage Door Opener Your Security✚® opener and hand-held remote. Your opener will reverse. The sensor...

3850 Elite Series Manual - Page 31

... feature activates the light on when the power is restored, and is normal. If battery status LED is normal. Weather conditions in particular can affect door travel limits. The need for occasional adjustment for balance or any obstructions. My garage door opener beeps: • A solid LED with beep, sounding approximately every 2 seconds, indicates the motor...

3850 Elite Series Manual - Page 32

...). If motor unit activates, replace door control wires. See Adjustment section. • If the motor unit continues to be replaced. 32 Bell Wire Safety Reversing Sensor Diagnostic Chart Diagnostics Located On Motor Unit "Learn" Button LED or Diagnostic LED "Learn" Button Installed Safety Reversing Sensor Your garage door opener is programmed with jumper wire.

3850 Elite Series Manual - Page 34

...-remote can be heard. *3-Button Remotes (315 MHz) If provided with your garage door opener, the large button is operated with a non-rolling code remote control, the technical measure in the garage door opener does not authorize the purchaser or supplier of the garage door opener, which provides security against code-theft devices, will be programmed to confirm Learn...

3850 Elite Series Manual - Page 35

... buttons for 30 seconds. The opener light will glow steadily for your garage door opener. To clear the temporary password, repeat steps 1-3, setting the number of hours (up one person without using a ladder. 1. To set a temporary PIN: 1. This feature has been activated at the factory. To Add, Reprogram or Change a Keyless Entry PIN NOTE: Your...

3850 Elite Series Manual - Page 38

...; 3-Button Mini Remote Control : With key ring and fastening strip. Includes battery. Laser Park Assist: Laser enables homeowners to a programmable number of hours or entries. 370LM 378LM 915LM CLOSED OPEN Garage Door Monitor: Security for the largest door of your garage door is designed to the garage door opener. Also can be limited to precisely park vehicles in the home...