Model # 139664956 Official Craftsman garage door opener

Here are the diagrams and repair parts for Official Craftsman 139664956 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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Showing 10 of 96 parts |

Chassis assembly diagram

Chassis assembly

Part #4A1258

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

#5A

Radio controls diagram

Transmitter

Part #6634

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

Rail assembly diagram

Cbl pul brk

Part #4A1229

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

#28

Chassis assembly diagram

Screw

Part #171A38

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

#16

Rail assembly diagram

Chain

Part #1A1930

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

Hex Head Bolt, 5/16-18 X 3/4-in, 5-pack STD523107

#23

Rail assembly diagram

Hex head bolt, 5/16-18 x 3/4-in, 5-pack

Part #STD523107

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

#13

Chassis assembly diagram

Terminal

Part #1A2510

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

#10

Chassis assembly diagram

Bracket

Part #12A303

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

#21

Rail assembly diagram

Bolt

Part #171A191

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

#33

Chassis assembly diagram

Lens

Part #108C6

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…

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 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…

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 is my garage door opener noisy?

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

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 does my garage door opener work intermittently?

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

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

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

Repair difficulty

Time required

60 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

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.…

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 open a garage door with an opener manually

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

Model # 139664956 Official Craftsman 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?

What preventive maintenance does my garage door opener need?

Why does my garage door opener reverse on its own?

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 is my garage door opener noisy?

Why doesn't my garage door opener work?

Why does my garage door opener work intermittently?

Most common repair guides to help fix your garage door openers

How to replace a chain-drive garage door opener motor

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

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

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 open a garage door with an opener manually

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