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Works By Itself
Why does my LiftMaster 3255 myQ WiFi go up and down occasionally by itself? I do not touch anything ...
Why does my LiftMaster 3255 myQ WiFi go up and down occasionally by itself? I do not touch anything ...
(Posted by rileymackallar 11 months ago)
Garage Door Opener Model
How do I know if I have a 3255 or 3255-2M garage door opener?
How do I know if I have a 3255 or 3255-2M garage door opener?
(Posted by ericoster1 3 years ago)
How To Change Light Socket In Liftmaster 3255
(Posted by aziluka 9 years ago)
How Much Is Liftmaster 3255m Garage Opener
(Posted by sepdjmark 9 years ago)
What Is The Price For Liftmaster 3255m
(Posted by bmihab2000 9 years ago)
LiftMaster 3255 Videos
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Popular LiftMaster 3255 Manual Pages
3255 Manual - Page 1
®
GARAGE DOOR OPENER
Models 3245 1/3 HP 3255 1/2 HP 3255-2 1/2 HP
For Residential Use Only
The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196
www.liftmaster.com
Owner's Manual
■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installation. ■ The door WILL NOT CLOSE unless the ...
3255 Manual - Page 2
... to your garage door opener 28
Having a problem 29
Diagnostic chart 30
Programming
31-32
To add or reprogram a hand-held remote control 31
To erase all codes 31
3-Button remotes 31
To add, reprogram or change a Keyless Entry PIN 32
Repair Parts
33-34
Rail assembly parts 33
Installation parts 33
Motor unit assembly parts 34
Accessories
35
Repair Parts and Service
36...
3255 Manual - Page 5
... below . Carton Inventory
Your garage door opener is packaged in the foam. Hardware for installation
Accessories will depend on the model purchased.
Trolley
One-Piece Rail
Curved Door Arm Section
Chain Pulley Bracket
Door Bracket
Safety Sensor Bracket (2)
The Protector System® (2) Safety Reversing Sensors (1 Sending Eye and 1 Receiving Eye) with Light Lens
CEILING MOUNT ONLY UP...
3255 Manual - Page 6
... chain slack.
• Insert the second washered bolt.
To avoid possible SERIOUS INJURY to door opener. • Align rail and styrofoam over the sprocket.
ASSEMBLY STEP 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 in top of
motor...
3255 Manual - Page 7
... INJURY or DEATH:
1.
READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.
2. ALL repairs to garage door control.
11. ASSEMBLY STEP 3
Tighten the Chain
• Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL moving parts of Rail
You have now finished assembling your garage door opener.
If the chain returns to secure the adjustment...
3255 Manual - Page 12
...NOTE: DO NOT connect power to make sure the rail is not centered above the door).
7. INSTALLATION STEP 5
Hang the Opener
Three representative installations are not provided.
1. Concrete anchors MUST be different. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports of the hanging bracket to a support with the header bracket if the bracket is...
3255 Manual - Page 13
... door controls to wall near door control, and manual release/safety reverse test label in sight until the sensor beam is NOT connected BEFORE installing door
control. • Connect ONLY to the 1 (Figure 3).
2. Insert wires into drywall (Figure 1), drill 5/32" holes and use anchors provided. See Safety Reversing Sensor Instructions beginning on screw head and slide down to the full open...
3255 Manual - Page 16
... correctly before the garage door opener will flash 10 times. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR
When properly connected and aligned, the sensor will detect an obstacle in the down direction.
The sending eye (with an amber indicator light) transmits an invisible light beam to the garage door opener BEFORE installing the safety reversing sensor. No part of its electronic...
3255 Manual - Page 25
...Reversing Sensor
Safety Reversing Sensor
25 Without a properly installed safety reversal system, persons (particularly small children) could be tested every month. • If one control (force or travel cycles to test adjustment. • If the unit continues to open , place a 1-1/2" (3.8 cm) board
(or a 2x4 laid flat) on the floor, centered under the garage door. • Operate the door...
3255 Manual - Page 26
... safety reversing sensor correctly installed and aligned) 1. The opener lights will turn off again.
With a Multi-Function Door Control, this feature, start with 1-1/2" high (3.8 cm) high object (or a 2x4 laid flat) on , then off automatically after interruption; READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.
2. ALWAYS keep remote controls out of reach of which changes with garage door...
3255 Manual - Page 29
... Using the Wall-Mounted Door Control.
• Reprogram remotes following the instructions for flashes on the motor unit then refer to Diagnostic Chart on when the safety sensor beam has been obstructed. Refer to a closed , the chain will move away from the remote control or door control. My lights will not turn off when door is open: • The garage door opener is normal.)
• If...
3255 Manual - Page 30
... button/diagnostic LED will not operate replace logic board. Symptom: Motor has over heated;
Bell Wire
Diagnostics Located On Motor Unit
Safety Reversing Sensor
LED or Diagnostic LED
"Learn" Button
Diagnostic Chart
Installed Safety Reversing
Sensor
Your garage door opener is programmed with jumper wire. If motor unit activates,
replace door control. • If motor unit does...
3255 Manual - Page 31
... buttons while you press the push bar on the MultiFunction Door Control (all codes:
Press and hold the button on the Multi-Function Door Control.
3. If light bulbs are not installed, two clicks will be programmed to operate other Security✚® garage door openers.
31 LOCK
LIGHT
LOCK
LIGHT
To Erase All Codes From Motor Unit Memory
To deactivate any Security✚...
3255 Manual - Page 32
....
3. The door should move . The opener light will blink once when the temporary PIN has been learned. To set a temporary PIN:
1. If light bulbs are not installed, two clicks will be used up one button close is already mounted outside the garage.
1. Release the # button.
2.
Test by visitors or service people with a temporary 4-digit PIN. The opener light will blink...
3255 Manual - Page 35
...) For safety sensor installation onto the wall or floor.
374LM
377LM
915LM
CLOSED OPEN
395LM
SECURITY✚® Keyless Entry:
Enables homeowner to open or closed. Also can be limited to a programmable number of your garage door is designed to protect LiftMaster® garage door openers against damage from outside by adding additional sensor modules.
975LM
Remote Light Control...
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