Craftsman 139.18451DM User Manual

1/2 HP
GARAGE DOOR OPENER
For Residential Use Only
Models • 139.18451DM • 139.18452DM • 139.18453DM • 139.18473DM • 139.18490DM
Read and follow all safety rules and
operating instructions before first use
of this product.
Fasten the manual near the garage
door after installation.
Periodic checks of the opener are
required to ensure safe operation.
Owner’s Manual
ENGLISH
Sears Canada, Inc., Toronto, Ontario M5B 2B8
■ Safety Precautions
■ Assembly
■ Installation
■ Adjustment
■ Maintenance
■ Operation
■ Troubleshooting
■ Parts List
®

Craftsman 139.18451DM Specifications

General

Brand	Craftsman
Model	139.18451DM
Category	Garage Door Opener
Language	English

Summary

Assembly Steps for Garage Door Opener

Assemble the Rail and Install the Trolley

Connects rail sections and installs the trolley assembly.

Fasten the Rail to the Motor Unit

Attaches the assembled rail to the main motor unit.

Install the Idler Pulley

Install the Chain and Cable

Tighten the Chain

Installation Guide for Garage Door Opener

Important Installation Safety Instructions

Critical safety warnings and instructions to follow before and during installation.

Determine Header Bracket Location

Install the Header Bracket

Attach Rail to Header Bracket

Position the Opener Unit

Hang the Opener Unit

Install the Door Control

Attach Emergency Release Rope and Handle

Electrical Requirements

Install The Protector System®

Instructions for installing the safety reversing sensor system.

Install Safety Reversing Sensor Brackets

Mount and Wire Safety Reversing Sensors

Fasten the Door Bracket

One-Piece Door Bracket Installation

Connect Door Arm to Trolley

One-Piece Door Arm Assembly and Connection

Adjustment Procedures for Garage Door Opener

Adjust UP and DOWN Travel Limits

Setting the opener's full open and close positions.

Adjust Door Force Settings

Regulating the power used to open and close the garage door.

Test the Safety Reversal System

Verifying the door reverses when encountering an obstruction.

Test The Protector System®

Checking the function of the safety reversing sensor.

Operation and Care of Your Garage Door Opener

Important Safety Instructions for Operation

Critical safety guidelines to prevent injury or death during opener use.

Using Your Garage Door Opener

Using the Wall-Mounted Door Control

Manually Opening the Garage Door

Troubleshooting Garage Door Opener Issues

Common Garage Door Opener Problems

Describes common issues like non-closing doors, remote failure, and unexpected reversals.

Diagnostic Chart for Troubleshooting

Explains LED flash codes to identify and resolve opener malfunctions.

Programming Your Garage Door Opener

Add or Reprogram Hand-held Remote Control

Instructions for pairing remote controls with the opener.

Erase All Remote Codes

Procedure to clear all previously programmed remote codes.

Add, Reprogram, or Change Keyless Entry PIN

Steps for setting up or modifying access codes for keyless entry.

Craftsman Garage Door Opener Limited Warranty