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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Owner’s manual

Error Codes

Model diagram and schematic

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ALL PARTS

Showing 10 of 48 parts |

Rail assembly diagram

Garage door opener drive belt

Part #41A5250

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

Accessories diagram

Garage door opener safety sensor bracket extension

Part #41A5281

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

Installation parts diagram

Lith battery

Part #10A20

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

Accessories diagram

Outside quick release:

Part #7702CB

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

Accessories diagram

Security+(r) keyless entry:

Part #940D

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

Garage Door Opener Hanging Bracket 12B776

#NI03

All parts diagram

Garage door opener hanging bracket

Part #12B776

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

Accessories diagram

Outdoor key switch:

Part #760CB

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

#NI02

All parts diagram

Installation hardware bag

Part #41A5257-10

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

Rail assembly diagram

Garage door opener complete rail assembly

Part #41A5665-2

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

#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

Most common symptoms to help you fix your garage door openers

Choose a symptom to see related garage door opener repairs.

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Why does my garage door opener open and close by itself?

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

Why doesn't my garage door opener work?

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

Why is my garage door opener noisy?

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

What preventive maintenance does my garage door opener need?

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

Why won't my garage door opener fully open or close the garage door?

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

Why won't my garage door opener open the garage door?

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

Why does my garage door opener work intermittently?

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

Why does my garage door opener reverse on its own?

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.

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How to replace a garage door opener battery

The garage door won't move during a power outage if the battery is dead. Here’s how to replace it.…

Repair difficulty

Time required

15 minutes or less

How to replace a garage door opener wall control

If you push the control button on the wall control and the garage door doesn’t move, the control is defective. Replace i…

Repair difficulty

Time required

15 minutes or less

How to replace a chain-drive garage door opener RPM sensor

Learn how to replace the RPM sensor if the door only moves 6 to 8 inches at a time and the LED light flashes 5 times. …

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.

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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

How to repair broken or damaged wires video

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

Model # 248754 Official Chamberlain garage door opener

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Most common symptoms to help you fix your garage door openers

Why does my garage door opener open and close by itself?

Why doesn't my garage door opener work?

Why is my garage door opener noisy?

What preventive maintenance does my garage door opener need?

Why won't my garage door opener fully open or close the garage door?

Why won't my garage door opener open the garage door?

Why does my garage door opener work intermittently?

Why does my garage door opener reverse on its own?

Most common repair guides to help fix your garage door openers

How to replace a garage door opener battery

How to replace a garage door opener wall control

How to replace a chain-drive garage door opener RPM sensor

Effective articles & videos to help repair your garage door openers

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

Top questions about Sears and Sears PartsDirect

How to repair broken or damaged wires video

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