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Replacing Garage door Extension Springs

*** this blog is for learning purpose's only and not a do it your self guide. if you have issues with your garage door springs or any parts, please seek professional assistance ***


Garage door extension springs play a crucial role in the smooth operation of your garage door. Over time, these springs may wear out or break, requiring replacement. While it is always recommended to hire a professional for garage door repairs, replacing extension springs can be done by homeowners with the right tools and knowledge. In this blog post, we will provide a step-by-step guide on how to replace garage door extension springs safely and effectively.

Step 1: Gather the Necessary Tools and Materials

Before you begin, make sure you have all the tools and materials required for the job. This includes a pair of safety glasses, gloves, a ladder, a wrench or socket set, a tape measure, new extension springs, and safety cables (if not already installed).

Step 2: Disconnect the Garage Door Opener

For safety reasons, it is essential to disconnect the garage door opener before working on the springs. This can usually be done by pulling the emergency release cord, which will disengage the opener from the door.

Step 3: Secure the Garage Door in the Open Position

To prevent the door from accidentally closing while you're working on it, secure it in the open position using a clamp or locking pliers. This will ensure your safety throughout the replacement process.

Step 4: Identify the Type and Size of Extension Springs

Extension springs come in various sizes and types, depending on the weight and height of your garage door. Measure the length and diameter of the old springs to ensure you purchase the correct replacements.

Step 5: Remove the Old Extension Springs

Using a wrench or socket set, loosen the set screws on the end of the extension spring pulley system. Carefully remove the old springs, paying attention to how they are connected to the pulley system and track brackets.

Step 6: Install the New Extension Springs

Attach the new extension springs to the pulley system and track brackets, following the same configuration as the old springs. Make sure they are securely fastened and properly tensioned.

Step 7: Install Safety Cables (If Necessary)

If your garage door does not already have safety cables installed, it is highly recommended to add them for extra protection. Safety cables prevent the extension springs from becoming projectiles in case of a spring failure.

Step 8: Test the Garage Door Operation

Once the new extension springs are installed, carefully remove the clamps or locking pliers and test the garage door's operation. Open and close the door several times to ensure it moves smoothly and without any issues.

Step 9: Reconnect the Garage Door Opener

After confirming that the garage door is functioning correctly, reconnect the opener by pulling the emergency release cord back into place. Test the opener to ensure it operates smoothly with the new springs.


Replacing garage door extension springs can be a challenging task, but with the right tools and knowledge, it is possible to do it yourself. However, if you are unsure or uncomfortable with the process, it is always best to hire a professional garage door technician. Remember to prioritize safety throughout the replacement process and follow the manufacturer's instructions for your specific garage door model. By following this step-by-step guide, you can successfully replace your garage door extension springs and ensure the smooth operation of your garage door.

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