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Genie
Garage Door Opener

Model # PMX300-IC/A Official Genie ac chain & belt drive garage door opener

Here are the diagrams and repair parts for Official Genie PMX300-IC-A ac chain & belt drive garage door opener, as well as links to manuals and error code tables, if available.

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Owner’s manual
Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 73 parts  |
Garage Door Opener Washer 27251A
Garage door opener washer

Part #27251A

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

Garage Door Opener Gear Housing, Lower 35221A
#26

Head - pmx300-ic/b, pmx500-ic/b, ic250b diagram

Garage door opener gear housing, lower

Part #35221A

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

Garage Door Opener Hex Nut 24121D05
#30

Rail - ic250, ic250/b diagram

Garage door opener hex nut

Part #24121D05

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

Switch 27221A
#21

Head - all other models diagram

Switch

Part #27221A

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

Garage Door Opener Limit Switch Worm Gear 27091A
Garage door opener limit switch worm gear

Part #27091A

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

Garage Door Opener Logic Board Bracket 32989A
#21

Head - pmx300-ic/b, pmx500-ic/b, ic250b diagram

Garage door opener logic board bracket

Part #32989A

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

Nut,#10-32 24121E05
Nut,#10-32

Part #24121E05

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

Screw,#8-1 27255B04
Screw,#8-1

Part #27255B04

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

Garage Door Opener Gear Housing, Center 35220A
#25

Head - pmx300-ic/b, pmx500-ic/b, ic250b diagram

Garage door opener gear housing, center

Part #35220A

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

Garage Door Opener Limit Wheel 27093A
Garage door opener limit wheel

Part #27093A

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…

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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…

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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…

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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…

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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 …

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Why is my garage door opener noisy?

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

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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…

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Why does my garage door opener work intermittently?

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

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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

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.…

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Repair difficulty
Time required
 60 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. …

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Repair difficulty
Time required
 60 minutes or less
How to replace a chain-drive garage door opener drive and worm gears

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.…

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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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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.…

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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.…

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How to open a garage door with an opener manually

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.…

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