Chamberlain
Garage Door Opener

Model # 248754 Official Chamberlain garage door opener

Here are the diagrams and repair parts for Official Chamberlain 248754 garage door opener, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 48 parts  |

Garage Door Opener Drive Belt 41A5250
#6

Rail assembly diagram

Garage door opener drive belt

Part #41A5250

The manufacturer no longer makes this part, and there's no substitute part

Garage Door Opener Belt Idler Pulley 144C54
#5

Rail assembly diagram

Garage door opener belt idler pulley

Part #144C54

The manufacturer no longer makes this part, and there's no substitute part

Garage Door Opener Trolley 41C5141-2
#2

Rail assembly diagram

Garage door opener trolley

Part #41C5141-2

The manufacturer no longer makes this part, and there's no substitute part

Garage Door Opener Light Lens 108D79
#10

Motor unit assembly diagram

Garage door opener light lens

Part #108D79

The manufacturer no longer makes this part, and there's no substitute part

Owner's Manual-spanish 114A3352SP

#NI05

All parts diagram

Owner's manual-spanish

Part #114A3352SP

The manufacturer no longer makes this part, and there's no substitute part

Installation Hardware Bag 41A5257-10

#NI02

All parts diagram

Installation hardware bag

Part #41A5257-10

The manufacturer no longer makes this part, and there's no substitute part

Garage Door Opener Safety Sensor Bracket Extension 41A5281
#5

Accessories diagram

Garage door opener safety sensor bracket extension

Part #41A5281

The manufacturer no longer makes this part, and there's no substitute part

Garage Door Opener Wire Harness 41A6281
#4

Motor unit assembly diagram

Garage door opener wire harness

Part #41A6281

The manufacturer no longer makes this part, and there's no substitute part

Bracket 41D598-1
#7

Rail assembly diagram

Bracket

Part #41D598-1

The manufacturer no longer makes this part, and there's no substitute part

Security+(r) Keyless Entry: 940D
#9

Accessories diagram

Security+(r) keyless entry:

Part #940D

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your garage door openers

Choose a symptom to see related garage door opener repairs.

Main causes: neighbor's remote programmed at the same time as yours, faulty wall control wiring, bad wall control unit…

Main causes: faulty logic control board, bad RPM sensor, broken gears in the drive system, bad drive motor…

Main causes: loose fasteners, broken brackets, need preventive maintenance, worn drive gears, loose or worn belt, loose …

Things to do: check garage door travel, tighten brackets and fasteners, test safety sensors, check travel limits and for…

Main causes: garage door opener misaligned, travel limits need adjustment, bad travel limit switches, faulty logic contr…

Main causes: garage door locked, damaged garage door tracks, up-force setting needs adjustment, RPM sensor failure, bad …

Main causes: radio interference, weak remote batteries, sunlight interference with safety sensor beams, safety sensors n…

Main causes: safety sensor beams blocked, safety sensors not aligned, downforce setting needs adjustment, damaged garage…

Most common repair guides to help fix your garage door openers

These step-by-step repair guides will help you safely fix what’s broken on your garage door opener.

How to replace a chain-drive garage door opener gear and sprocket assembly

How to replace a chain-drive garage door opener gear and sprocket assembly

Learn how to replace the gear and sprocket assembly on your garage door opener if the drive motor runs but the door won'…

Repair difficulty
Time required
 60 minutes or less
How to replace a garage door opener logic board

How to replace a garage door opener logic board

The logic board is the brains of the garage door opener. If the remote doesn't work or the door doesn't open and close p…

Repair difficulty
Time required
 60 minutes or less
How to replace a garage door opener drive chain and cable assembly

How to replace a garage door opener drive chain and cable assembly

If your garage door won’t move, the chain and cable assembly on your garage door opener could be broken. Follow these st…

Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your garage door openers

Use the advice and tips in these articles and videos to get the most out of your garage door opener.

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

How to repair broken or damaged wires video

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…