garage door opener repaiR

If it seems like aliens have control of your garage door opener because it opens or closes by itself, works intermittently or just won't work at all.

Do the motor unit lights flash a repeating pattern?

Those flashing lights are error codes telling you what's wrong with your garage door opener. Find the pattern of your unit's flashing lights on our error code charts to find out the problem. Once you figure out which part to replace, follow the steps in our DIY repair guides to replace the broken part.

If you still haven't figured out the problem, our garage door opener articles and videos can help. From troubleshooting problems with safety sensor system to how and when to make force adjustments to why your garage door remotes won't work, our videos will walk you through the problem and how to fix it.

Looking for an owner’s manual or a complete list of replacement parts for your garage door opener? Search for your model number to find the information you need.

Garage door opener symptoms

A garage door opener that reverses on its own, won't open or works intermittently will need some troubleshooting to fix the problem. Our symptoms and troubleshooting advice can help you determine what's causing these and other garage door opener failures.

You can then get the repair parts you need and use our garage door opener repair guides to help get your garage door opener working again.

Symptoms common to all garage door openers

Choose a symptom to see related garage door opener repairs.

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

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Main causes: safety sensor beams blocked, safety sensors not aligned, downforce setting needs adjustment, damaged garage door tracks

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Things to do: check garage door travel, tighten brackets and fasteners, test safety sensors, check travel limits and force limits

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Main causes: faulty logic control board, bad RPM sensor, broken gears in the drive system, bad drive motor

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Main causes: garage door opener misaligned, travel limits need adjustment, bad travel limit switches, faulty logic control board

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Main causes: neighbor's remote programmed at the same time as yours, faulty wall control wiring, bad wall control unit

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Main causes: radio interference, weak remote batteries, sunlight interference with safety sensor beams, safety sensors need adjustment

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Main causes: garage door locked, damaged garage door tracks, up-force setting needs adjustment, RPM sensor failure, bad drive motor

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Garage door opener repair guides

These DIY repair guides and videos can help you fix your garage door opener yourself by showing you how to replace common parts such as safety sensors and internal gears. When you need help diagnosing a problem, check out our garage door opener repair help section for troubleshooting tips and error code charts.

Our repair advice covers major garage door opener brands such as Craftsman, Chamberlain and Genie. Search your model number to find a complete list of replacement parts for your garage door opener, then order the part you need.

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.

The garage door won't move during a power outage if the battery is dead. Here’s how to replace it.


Time required

15 minutes or less

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Get your garage door moving again by replacing a defective motor in your garage door opener.


Time required

60 minutes or less

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


Time required

60 minutes or less

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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.


Time required

60 minutes or less

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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.


Time required

60 minutes or less

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If you push the control button on the wall control and the garage door doesn’t move, the control is defective. Replace it in less than 15 minutes.


Time required

15 minutes or less

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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.


Time required

60 minutes or less

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If your remotes don’t work and the lights on the motor unit blink when you press a remote, the safety sensors may have failed. This guide will help you replace them.


Time required

15 minutes or less

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A damaged or broken belt on your garage door opener could be the reason it won’t move the door. Here’s how to fix it.


Time required

60 minutes or less

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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.


Time required

60 minutes or less

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If your garage door won’t move, the drive and worm gears could be broken. This guide will help you replace the gears.


Time required

60 minutes or less

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