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Craftsman
Garage Door Opener

Model # 139664020 Official Craftsman garage door opener

Here are the diagrams and repair parts for Official Craftsman 139664020 garage door opener, as well as links to manuals and error code tables, if available.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 47 parts  |
Screw 171A254
#28

Chassis assembly diagram

Screw

Part #171A254

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

Screw 171A212
#16

Chassis assembly diagram

Screw

Part #171A212

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

Rec Sw Brd 4A1215
#6

Receiver diagram

Rec sw brd

Part #4A1215

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

Limit Nut 133A136
#39

Chassis assembly diagram

Limit nut

Part #133A136

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

Garage Door Opener Curved Door Arm 178B23
#26

Rail assembly diagram

Garage door opener curved door arm

Part #178B23

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

Lt Sprkt Ay 4A1197
#21

Chassis assembly diagram

Lt sprkt ay

Part #4A1197

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

Spring 177A85
#8

Chassis assembly diagram

Spring

Part #177A85

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

Bracket 12A197
#23

Rail assembly diagram

Bracket

Part #12A197

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

Antenna 161A15
#7

Receiver diagram

Antenna

Part #161A15

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

Cable Pulley 144A12
#6A

Rail assembly diagram

Cable pulley

Part #144A12

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…

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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 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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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 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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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 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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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 motor

How to replace a chain-drive garage door opener motor

Get your garage door moving again by replacing a defective motor in your garage door opener.…

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Repair difficulty
Time required
 60 minutes or less
How to replace a chain-drive garage door opener RPM sensor

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. …

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Repair difficulty
Time required
 60 minutes or less
How to replace a chain-drive garage door opener drive and worm gears

How to replace a chain-drive garage door opener drive and worm gears

If your garage door won’t move, the drive and worm gears could be broken. This guide will help you replace the gears.…

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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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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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How to open a garage door with an opener manually

How to open a garage door with an opener manually

Learn how to open a garage door manually if power to your garage door opener fails.…

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