Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
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.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 101 parts  |
Screw 171A247
#6

Chassis assembly diagram

Screw

Part #171A247

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

Screw 171A183
#1

Chassis assembly diagram

Screw

Part #171A183

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

Screw 171A248
#35

Chassis assembly diagram

Screw

Part #171A248

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

Screw 171A184
Screw

Part #171A184

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

Chassis Assembly 4A1188
#17

Chassis assembly diagram

Chassis assembly

Part #4A1188

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

Screw 171A254
#28

Chassis assembly diagram

Screw

Part #171A254

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

T-rail End 183B36
#21

Rail assembly diagram

T-rail end

Part #183B36

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

Logic Board 4A1226
#22

Chassis assembly diagram

Logic board

Part #4A1226

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

Obs. Sw 4A1230
#45

Chassis assembly diagram

Obs. sw

Part #4A1230

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

Roll Pin 146A39
#50

Chassis assembly diagram

Roll pin

Part #146A39

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.

View all

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…

Read more

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 …

Read more

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…

Read more

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…

Read more

Why does my garage door opener work intermittently?

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

Read more

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…

Read more

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…

Read more

Why is my garage door opener noisy?

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

Read more

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.

View all
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.…

Read more
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. …

Read more
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.

View all
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.…

Read more
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.…

Read more
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.…

Read more

Parts & More