Genie
Garage Door Opener

Model #GCG350ML Official Genie ac chain drive garage door opener

Here are the diagrams and repair parts for Genie GCG350ML ac chain drive garage door opener, as well as links to manuals and error code tables, if available.

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

Owner’s manual

Showing 10 of 143 parts

Garage Door Opener Screw#10

Head Diagram

Garage door opener screw

Part #24501D04

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

Garage Door Opener Cotter Pin

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Garage door opener cotter pin

Part #34542A

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

Garage Door Opener Rail Clamp#8

Rail - gcg350l-gcg350ml, h2000, 1020l, 2020l Diagram

Garage door opener rail clamp

Part #33744A04

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

Spacer

#NI01

All parts Diagram

Spacer

Part #33225A

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

Garage Door Opener Screw

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Garage door opener screw

Part #8094H04

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

Garage Door Opener Bolt

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Garage door opener bolt

Part #3359Q06

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

Garage Door Opener Logic Board Bracket#14

Head Diagram

Garage door opener logic board bracket

Part #32989A

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

Garage Door Opener Motor Bushing#23

Head Diagram

Garage door opener motor bushing

Part #33221A

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

Antenna Kit#4

Gated community receiver set & accessories Diagram

Antenna kit

Part #108035.0007

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

Garage Door Opener Hex Nut

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Garage door opener hex nut

Part #24121D05

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

Symptoms common to all garage door openers

Choose a symptom to see related garage door opener repairs.

Things to do: check garage door travel, tighten brackets and fasteners, test safety sensors, check travel limits and force limits
Main causes: loose fasteners, broken brackets, need preventive maintenance, worn drive gears, loose or worn belt, loose chain
Main causes: faulty logic control board, bad RPM sensor, broken gears in the drive system, bad drive motor
Main causes: neighbor's remote programmed at the same time as yours, faulty wall control wiring, bad wall control unit
Main causes: garage door locked, damaged garage door tracks, up-force setting needs adjustment, RPM sensor failure, bad drive motor
Main causes: radio interference, weak remote batteries, sunlight interference with safety sensor beams, safety sensors need adjustment
Main causes: safety sensor beams blocked, safety sensors not aligned, downforce setting needs adjustment, damaged garage door tracks
Main causes: garage door opener misaligned, travel limits need adjustment, bad travel limit switches, faulty logic control board

Repair guides common to all garage door openers

These step-by-step repair guides will help you safely fix what’s broken on your garage door opener.

How to replace a chain-drive garage door opener gear and sprocket assembly

Learn how to replace the gear and sprocket assembly on your garage door opener if the drive motor runs but the door won't move.

Repair difficulty
Time required
 60 minutes or less
How to replace a garage door opener logic board

The logic board is the brains of the garage door opener. If the remote doesn't work or the door doesn't open and close properly, the logic board could be the problem. This repair guide shows you how to fix it yourself.

Repair difficulty
Time required
 60 minutes or less
How to replace a garage door opener drive chain and cable assembly

If your garage door won’t move, the chain and cable assembly on your garage door opener could be broken. Follow these step-by-step instructions to replace it.

Repair difficulty
Time required
 60 minutes or less

Articles and videos common to all garage door openers

Use the advice and tips in these articles and videos to get the most out of your garage door opener.

October 24, 2022

Easy DIY appliance repairs that anyone can do

Lyle Weischwill

Get advice on simple DIY fixes for appliances that you can safely do on your own.

December 1, 2020

Garage door won't close/safety sensor troubleshooting video—lights blink 10 times

Lyle Weischwill

Learn how to check and fix safety sensor and wiring problems.

June 24, 2016

Garage door opener remotes won't work video

Lyle Weischwill

If your remotes don't work, you might need to disable the lock feature, eliminate RF interference or check the batteries.