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Genie
Garage Door Opener

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

Here are the diagrams and repair parts for Official Genie PMX300-IC-B 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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Showing 10 of 166 parts  |
Garage Door Opener Screw 27250A30
Garage door opener screw

Part #27250A30

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

Screw,#8-1 27293A04
Screw,#8-1

Part #27293A04

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

Garage Door Opener Washer 27089A
Garage door opener washer

Part #27089A

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

Strnrelief 9541C
Strnrelief

Part #9541C

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

Garage Door Opener Chain Idler Pulley 26966D
#184

Rail - all other models diagram

Garage door opener chain idler pulley

Part #26966D

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

Garage Door Opener Fastener Pin 18586A04
Garage door opener fastener pin

Part #18586A04

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

Garage Door Opener Chain Connecting Link 20060A
#41

Rail - ic250, ic250/b diagram

Garage door opener chain connecting link

Part #20060A

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

Garage Door Opener Washer 27251A
Garage door opener washer

Part #27251A

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

Screw,#8x3 30417A04
Screw,#8x3

Part #30417A04

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

Garage Door Opener Logic Board 20393R
#7A

Head - all other models diagram

Garage door opener logic board

Part #20393R

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…

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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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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 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 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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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 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 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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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 belt-drive garage door opener motor

How to replace a belt-drive garage door opener motor

The garage door won't move if the motor is defective. Here’s how to fix it.…

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

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 st…

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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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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.…

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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 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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