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Craftsman
Garage Door Opener

Model # 20057943 Official Craftsman garage door opener

Here are the diagrams and repair parts for Official Craftsman 20057943 garage door opener, as well as links to manuals and error code tables, if available.

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Installation guide
Owner’s manual
Error Codes

Model diagram and schematic

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Showing 10 of 36 parts  |
Craftsman Series 100 Garage Door Opener Remote Control 58502
#3

Accessories diagram

Craftsman series 100 garage door opener remote control

Part #58502

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$40.22 | 
13% OFF Phone Price : $46.22
In Stock
Garage Door Opener Trolley RP-004
#5

Rail assembly diagram

Garage door opener trolley

Part #RP-004

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$26.59 | 
18% OFF Phone Price : $32.59
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Craftsman Garage Door Opener Keyless Entry 57939
#6

Accessories diagram

Craftsman garage door opener keyless entry

Part #57939

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$58.19 | 
9% OFF Phone Price : $64.19
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Garage Door Opener Safety Sensor Kit GUAT-201
#1

Accessories diagram

Garage door opener safety sensor kit

Part #GUAT-201

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$39.41 | 
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Garage Door Opener Gear And Sprocket Assembly GUAT-323
#2

Opener assembly diagram

Garage door opener gear and sprocket assembly

Part #GUAT-323

$42.09 | 
12% OFF Phone Price : $48.09
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Garage Door Opener Logic Board GUAT-310
#11

Opener assembly diagram

Garage door opener logic board

Part #GUAT-310

$88.76 | 
6% OFF Phone Price : $94.76
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Garage Door Opener Rail, Center RP-002
#2

Rail assembly diagram

Garage door opener rail, center

Part #RP-002

$19.09 | 
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Garage Door Opener Drive Gear GUAT-311
#12

Opener assembly diagram

Garage door opener drive gear

Part #GUAT-311

This item is not returnable
$5.49 | 
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Garage Door Opener Door Bracket GUAT-022
#2

Installation parts diagram

Garage door opener door bracket

Part #GUAT-022

This item is not returnable
$6.68
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Garage Door Opener Limit Switch GUAT-312
#13

Opener assembly diagram

Garage door opener limit switch

Part #GUAT-312

$30.14
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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…

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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…

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Why is my garage door opener noisy?

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

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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…

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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…

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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 …

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Why does my garage door opener work intermittently?

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

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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…

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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 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'…

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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…

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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…

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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

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.…

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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.…

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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.…

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