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Removing Black Plastic Cover
Can see and remove one screw at bottom of black plastic cover, but still cannot get cover off. how d...
(Posted by nevlaing 3 years ago)
On The Sensors It Showing Two Wires Going Into The Quick Connect I Have Four Wir
how do I put the wires in for the sensor two sensors for wires
(Posted by ruckustak 3 years ago)
Explain How To Get To The Logic Board On A Liftmaster 3800 Thank You
I Can't Open The Door. The Door Control Doesn't Light Up, But My Tester Shows Voltage. I Purchased A...
(Posted by GJO0688 4 years ago)
How Do I Reset The Travel Limits On 3800 Pld
(Posted by sywhicsh122 9 years ago)

LiftMaster 3800 Videos

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Popular LiftMaster 3800 Manual Pages

3800 Manual - Page 1

...174; GARAGE DOOR OPENER Model 3800 For Residential Sectional Doors With Torsion Assemblies Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com patible with See Page 13 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installation. ■...
3800 Manual - Page 2

... 13 Install The Protector System 14-16 Adjustment 17-20 Program the travel limits 17 Setting the force 18 Test the safety reversal system 19 Test The Protector System 19 Test cable tension monitor 20 Test power door lock 20 To open door manually 20 Operation 21-25 Operation safety instructions 21 Using your garage door opener 21 Using the wall-mounted control...
3800 Manual - Page 4

...operate garage door opener at 120V, 60 Hz to avoid entanglement. Verify equal cable tension on each side of balance. WARNING To prevent possible SERIOUS INJURY or DEATH: CAUTION • ALWAYS call for hand tools as shown. Sectional Door Tools needed During assembly, installation and adjustment of the opener, instructions will call a trained door systems technician if garage door binds...
3800 Manual - Page 5

... Head Screw #8x1" (2) Self Tapping Screw #10-32 (2) Drywall Anchor (2) Drywall Anchor (Screw-In) (2) Handle Rope Insulated Staples (30) Lock Template (Located Under Access Door) 5 If anything is packaged in one carton which contains the motor unit and the parts illustrated below. Carton Inventory Your garage door opener is missing, carefully check the packing material.
3800 Manual - Page 6

...To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Loosen the collar screws. • Attach collar to either the left side installation. Ensure ...not tighten set screws until instructed. Figure 1 Collar Screw Set Screw Collar Screw ASSEMBLY STEP 2 Attach Mounting Bracket to Motor Unit • Loosely attach slotted side of mounting bracket to...
3800 Manual - Page 7

... or loose clothing while installing or servicing opener. Place manual release/safety reverse test label in garage door or opener mechanisms. 8. Snug collar screws to avoid entanglement. 5 Mount emergency release handle no higher than 6 feet (1.83 m) above floor. 6. Drill 3/16" pilot holes at minimum height of 5 feet (1.5 m). • away from ALL moving parts of balance. Fasten bracket...
3800 Manual - Page 9

... garage door opener will reverse the door when excessive slack is detected. 2. Attach the cable tension monitor to the drum as the opener. If this condition exists, adjust cables as shown (Figures 1 and 2). Connect bell wire to motor unit. INSTALLATION STEP 4 Attach the Cable Tension Monitor (Required) This opener comes standard with the lag screws provided, it can be mounted...
3800 Manual - Page 10

... same garage door opener, it can be seen clearly, is properly adjusted and there are no obstructions to door travel to the full open circuit. 4. See Protector System Instructions beginning on the motor unit: white to white and white/red to the R (1) (Figure 2). 2. WARNING To prevent possible SERIOUS INJURY or DEATH from end of bell wire. If installing...
3800 Manual - Page 12

... If permanent wiring is required by your garage door opener has a grounding type plug with moving parts. • Reinstall the cover. This plug will only fit into the outlet you have, contact a qualified electrician to the following procedure. INSTAWLLAARTINOINNGSTEP 7 Electrical Requirements CAUTION To avoid installation difficulties, do not run the opener at this time. To avoid...
3800 Manual - Page 21

... monitor correctly installed and aligned): 1. SAVE THESE INSTRUCTIONS. If closing , the door will not close from a hand-held remote control have been factory programmed to door travel is broken. If the obstruction interrupts the sensor beam, the opener lights will reverse. 3. If obstructed while opening, the door will close when the beam is complete. ALWAYS keep garage...
3800 Manual - Page 24

... then won't work: • The garage door springs may be broken. The opener won 't close the door manually. Power lock makes noise when operating. • Call Liftmaster® dealer for no apparent reason and opener lights blink for this solves the problem, the door control is faulty (replace), or there is a new installation. If this product. See Installation Step 9. • If the...
3800 Manual - Page 26

... heard. Below are not installed, two clicks will be programmed to operate with your garage door opener, the large button is operated with your garage door. 3. Release the button when the motor unit lights blink. The owner of the copyright in the receiver of the non-rolling code transmitter to confirm Learn Mode. 3. Your garage door opener has already been programmed...
3800 Manual - Page 27

... the button when the motor unit lights blink. It has learned the code. To change an existing, known PIN 3. Enter a four digit personal identification number (PIN) of your garage door opener. LOCK LIGHT If the existing PIN is already mounted outside the garage. 1. Press the four buttons for the present PIN, then press and hold buttons...
3800 Manual - Page 31

... garage door opener from anywhere in the garage. 31 Also can be limited to a programmable number of your garage door is open or closed. Enhanced functions include Lock Feature to lock out outside by adding additional sensor modules. 916LM Garage Door Monitor Sensor: Additional accessory sensor for homes with Security✚®: Enables homeowner to the model 3800 and 3500 garage...
3800 Manual - Page 32

... DOES NOT COVER ANY PROBLEMS CAUSED BY INTERFERENCE. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. All Rights Reserved Country Club Road Tucson, Arizona 85706 SERVICE INFORMATION TOLL FREE NUMBER: 1-800-528-9131 LIFTMASTER® GARAGE DOOR OPENER FIVE-YEAR LIMITED...

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  • 3800 Manual
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