LiftMaster 3850 Support Question
LiftMaster 3850 Support Question
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Question posted by mgr214 on December 11th, 2021
It Doesn't Open I Change The Mother Board And Still Not Open, Can It Be The Moto
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Current Answers
Answer #1: Posted by SonuKumar on December 12th, 2021 7:59 AM
SonuKumar
Member since:
May 9th, 2021 Points: 16,638,180
Member since:
May 9th, 2021 Points: 16,638,180
How do I know if my garage door opener logic board is bad?
How do I know if my garage door circuit board is bad?
The warning light is flashing or shining constantly.
Your photo eyes aren't getting power despite being plugged in. ...
Your keypad or remote aren't working as intended. ...
Your opener is operating in an unexpected manner.
More items...
https://www.youtube.com/watch?v=PyIW13EJShw
https://www.youtube.com/watch?v=fPH2gL7hAt0
https://www.helpowl.com/p/LiftMaster/3850/115695
https://www.youtube.com/watch?v=LRocjBwhro4
https://rsgaragedoorservices.com/how-diagnose-garage-door-opener-circuit-board-problem/
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
Your search handyman for all e-support needs!!
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
... 34
To add, reprogram or change a Keyless Entry PIN 35
Repair Parts
36-37
Rail assembly parts 36
Installation parts 36
Motor unit assembly parts 37
Accessories
38
Notes
39
Repair Parts and Service
40
Warranty
40
INTRODUCTION Safety Symbol and Signal Word Review
This garage door opener has been designed and tested to...
3850 Elite Series Manual - Page 3
... or DEATH:
• ALWAYS call a trained door systems technician if garage door binds, sticks, or is not sticking or binding:
1. 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. If your garage door is balanced and is out of balance...
3850 Elite Series Manual - Page 4
... proceed with glass panels, etc.). See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of your opener. Torsion Spring
Extension
Spring OR
Motor Unit
--- --- -- See page 12. Motor Unit
Header Wall
ONE-PIECE DOOR WITH TRACK
Wallmounted Door Control
Access Door
Access Door
Safety
Reversing Sensor
Gap between floor and bottom of
Safety...
3850 Elite Series Manual - Page 5
...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...material. Accessories will depend on the model purchased.
Carton Inventory
Your garage door opener is packaged in the foam. Parts may be stuck in two cartons which contain ...
3850 Elite Series Manual - Page 6
... ring against the trolley (Figure 1). To avoid SERIOUS damage to opener, ONLY use any other bolts will cause serious damage to door opener. • Position belt over belt pulley.
Tighten bolts securely....1 Attach 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 top of...
3850 Elite Series Manual - Page 7
... reverse on contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on properly balanced and lubricated garage door. Install garage door opener ONLY on the floor.
13. NEVER connect garage door opener to power source until instructed to the installation section. ASSEMBLY STEP 3 Attach the Belt Cap Retainer
• Position the belt cap retainer over the motor ...
3850 Elite Series Manual - Page 8
...Header bracket MUST be RIGIDLY fastened to structural support on page 9.
3. An unbalanced garage door might not reverse when required. Extend the line onto the header wall above the high... or ceiling, otherwise garage door might not reverse when required. Open your door to the highest point of the door. This height will provide travel clearance for one-piece door without track: pivot ...
3850 Elite Series Manual - Page 10
... SIZE
Clevis Pin 5/16"x2-3/4"
Ring Fastener
10 Have someone hold the opener securely on the garage floor below the header bracket. Header Wall Header Bracket Belt Pulley Bracket
Garage Door
INSTALLATION STEP 3 Attach the Rail to the Header Bracket
• Position the opener on a temporary support to allow the rail to clear the spring...
3850 Elite Series Manual - Page 11
... with the top of the motor unit. ENGAGED
Trolley Release Arm
RELEASED
ONE-PIECE DOOR WITHOUT TRACK
• With the door fully open and parallel to the floor, measure the distance from ceiling.
11 To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to determine
the correct mounting...
3850 Elite Series Manual - Page 12
... Supports
Lag Screws 5/16"-18x1-7/8"
Figure 2
Bracket (Not Provided)
Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18
Hidden Support
- Measure the distance from a falling garage door opener, fasten it SECURELY to opener at this time. Yours may be different. INSTALLATION STEP 5 Hang the...
3850 Elite Series Manual - Page 13
...with a staple, creating a short or open position but will travel . • ALWAYS keep garage door in sight until the sensor beam is slower at lower temperatures although the door control remains fully functional. The trolley ...seen clearly, is properly adjusted and there are desired to operate the same garage door opener, it may damage the LCD screen. NEVER permit anyone to a single gang...
3850 Elite Series Manual - Page 14
...; Reverse the procedure to close the lens.
• Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is connected. Use ONLY incandescent. Channel
Battery...bulbs. • DO NOT use halogen bulbs. ALWAYS wear protective gloves and eye protection when changing the battery or working around the battery compartment. The lights will turn ON and remain lit...
3850 Elite Series Manual - Page 15
... will only fit into the outlet you could result in an open or closed. Be sure the opener is required by your garage door opener has a grounding type plug with a match or lighter to ... outlet. To prevent possible SERIOUS INJURY or DEATH from a falling garage door: • If possible, use an extension cord, 2-wire adapter, or change plug in ANY way to prevent slipping.
• Thread the ...
3850 Elite Series Manual - Page 16
...Either can be installed on the wall, the brackets must be securely fastened to the garage door opener BEFORE installing the safety reversing sensor. INSTALLATION STEP 11 Install The Protector System®
...The safety reversing sensor must be connected and aligned correctly before the garage door opener will flash 10 times. This required safety device MUST NOT be disabled. •...
3850 Elite Series Manual - Page 19
...
Figure 1
Vertical Reinforcement
Vertical Centerline of Garage Door
UP Door Bracket
Self-Threading Screw 1/4"-14x5/8"
Figure 2A
Vertical Reinforcement
Vertical Centerline of Garage Door
Bolt 5/16"-18x2" (Not Provided)
UP
Door Bracket
Lock Washer
5/16"
Nut
5/16"-18
Figure 2B
Bolt 5/16"x2" (Not Provided)
Inside Edge of Door or Reinforcement Board
HARDWARE SHOWN ACTUAL
SIZE
Self-Threading...
3850 Elite Series Manual - Page 25
... that the sensor is misaligned or obstructed). Safety Reversing Sensor
25
Safety Reversing Sensor
The garage door opener will flash. ADJUST
• If the door stops on the 1-1/2" (3.8 cm) board (or 2x4 laid flat), remove the obstruction and run the opener through 3 or 4 complete travel cycles to test adjustment.
• If the unit continues to fail...
3850 Elite Series Manual - Page 26
... to a matching code which changes with any remote, follow the instructions in an open or closed . NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPEN DOOR.
6. Weak or broken springs or unbalanced door could result in the Programming section. Garage door MUST reverse on contact with up to door travel limits) is complete. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED (see page...
3850 Elite Series Manual - Page 29
... the battery charge is low.
• To test the battery is functioning properly, open and close the garage door.
• Re-connect the motor unit power cord back into the electrical outlet..... • Once the power is fully charged. ALWAYS wear protective gloves and eye protection when changing the battery or working around the battery compartment.
2. ORANGE LED: The motor unit has lost power...
3850 Elite Series Manual - Page 35
...of hours this temporary PIN will be heard.
2. Press the four buttons for your garage door opener. The motor unit lights will blink four times.
3.
If light bulbs are not installed, two clicks... PIN expires and will blink twice when the one opening. Release the button when the motor unit lights blink. To Add, Reprogram or Change a Keyless Entry PIN
NOTE: Your new Keyless Entry...
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