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Craftsman
Garage Door Opener

Model # 139664320 Official Craftsman garage door opener

Here are the diagrams and repair parts for Official Craftsman 139664320 garage door opener, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 95 parts  |
Screw 171A183
#1

Chassis assembly diagram

Screw

Part #171A183

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

Transmitter 6642
#10

Receiver and transmitter diagram

Transmitter

Part #6642

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

Door Arm 178B22
#25

Rail assembly diagram

Door arm

Part #178B22

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

Switch Key 6528
#11

Receiver and transmitter diagram

Switch key

Part #6528

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

Screw 171A24
#26

Rail assembly diagram

Screw

Part #171A24

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

Wire Harn. 1B1967

#NI

All parts diagram

Wire harn.

Part #1B1967

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

'e' Ring 158A29
#28

Chassis assembly diagram

'e' ring

Part #158A29

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

Bracket 12A279
#27

Chassis assembly diagram

Bracket

Part #12A279

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

Driven Gear 81B24
#34B

Chassis assembly diagram

Driven gear

Part #81B24

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

Wire Harn. 1B1968

#NI

All parts diagram

Wire harn.

Part #1B1968

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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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 garage door opener battery

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.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a garage door opener wall control

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…

Read more
Repair difficulty
Time required
 15 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

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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