Model # CM8500S Official Genie garage door opener

Here are the diagrams and repair parts for Official Genie CM8500S 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 103 parts |

Keypads & covers diagram

Keyless entr

Part #35282R

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

Garage door opener hex nut

Part #24121C05

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

#137

Head diagram

Clamp

Part #25731A

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

#133

Head diagram

Cord plug

Part #24567R

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

#128

Head diagram

Screw

Part #24940A30

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

Gated community receiver set & accessories diagram

Antenna kit

Part #108035.0007

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

#122

Head diagram

Pcb bracket

Part #25609A

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

Garage Door Opener Down Limit Wire Harness (brown) 20418R

#NI02

All parts diagram

Garage door opener down limit wire harness (brown)

Part #20418R

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

Garage door opener screw

Part #5973Q04

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

Garage door opener nut

Part #24121B05

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 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…

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 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 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…

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 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 is my garage door opener noisy?

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

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 # CM8500S Official Genie garage door opener

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Most common symptoms to help you fix your garage door openers

Why doesn't my garage door opener work?

Why does my garage door opener work intermittently?

What preventive maintenance does my garage door opener need?

Why won't my garage door opener open the garage door?

Why does my garage door opener open and close by itself?

Why won't my garage door opener fully open or close the garage door?

Why does my garage door opener reverse on its own?

Why is my garage door opener noisy?

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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