Model # PCG450L Official Genie ac chain drive garage door opener

Here are the diagrams and repair parts for Official Genie PCG450L ac chain drive 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

ALL PARTS

Showing 10 of 143 parts |

Garage door opener screw

Part #8094H04

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

Garage door opener screw

Part #605879.0001

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

#26

Head diagram

Garage door opener washer

Part #27087A

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

Garage door opener bolt

Part #33760A04

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

Garage door opener wire clip

Part #24222A

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

Miscellaneous accessories diagram

Battery, 9-volt

Part #9333A

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 limit switch, upper

Part #34538R

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

Garage Door Opener Wire Harness (gray) 20417R

#NI13

All parts diagram

Garage door opener wire harness (gray)

Part #20417R

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

Most common symptoms to help you fix your garage door openers

Choose a symptom to see related garage door opener repairs.

View all

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.

View all

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.

View all

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 # PCG450L Official Genie ac chain drive 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

Parts & More

Stay Connected

Quick links

Let us help you

More resources