To replace garage door springs, you must disconnect the opener, secure the door, release spring tension using winding bars, remove the old spring, install the new one, and properly wind it to the correct tension. This job is dangerous and should only be done if you understand spring systems. Garage door springs carry the full weight of the door. If one breaks, the door becomes heavy and unsafe. I will explain the process step by step.

Step-by-Step: Replacing Torsion Garage Door Springs

This process applies to torsion springs, which are most common.

Step 1: Disconnect the Opener

Unplug the garage door opener. Pull the emergency release cord. Always disconnect power before touching springs.

Step 2: Secure the Door

Clamp locking pliers under the rollers on both sides. This prevents the door from moving.

Step 3: Release Spring Tension

Insert a winding bar into the winding cone. Carefully unwind the spring using winding bars. Steps:

1. Insert winding bar firmly.
2. Hold it tight.
3. Loosen set screws.
4. Slowly lower bar.
5. Insert second bar before removing first.

Repeat until all tension is released. Never stand in front of the spring. Stand to the side.

Step 4: Remove the Old Spring

Once tension is fully removed:

• Loosen cable drums
• Slide spring off shaft
• Remove center bracket bolts

Support the shaft so it does not fall.

Step 5: Install the New Spring

Slide the new spring onto the shaft. Make sure:

• The spring is the correct size
• The winding direction matches
• Stationary cone faces the center bracket

Secure the center bracket bolts tightly.

Step 6: Reattach Cables

Loop cables back onto drums. Make sure cables sit correctly in drum grooves. Tighten drum set screws.

Step 7: Wind the New Spring

Use winding bars again. Wind the spring the correct number of turns based on the door height. Standard rule:

• 7.5 turns for a 7-foot door
• 8.5 turns for an 8-foot door

After winding:

• Tighten set screws firmly
• Remove locking pliers

Test the door balance manually before reconnecting the opener.

How To Replace Extension Springs

Extension springs are slightly simpler but still risky. Basic steps:

1. Open door fully to release tension
2. Clamp the door open
3. Disconnect safety cable
4. Remove old spring
5. Install a new spring
6. Reattach safety cable

Always replace both springs at the same time.

When to Call a Professional

Call a technician if:

• You do not have proper tools
• The shaft is bent
• Cables are damaged
• The door is very heavy
• You are unsure about the spring size

An incorrect spring size can damage the opener and door system.

Safe Spring Replacement Starts with Proper Knowledge

To replace garage door springs, you must disconnect power, release tension safely, remove the old spring, install the new one, and wind it correctly. The job requires proper tools and careful handling. Springs control the full weight of your garage door. Mistakes can lead to serious injury. If you have the right tools and experience, follow each step carefully. If not, professional repair is the safest choice. A properly installed spring keeps your garage door balanced, smooth, and safe for years to come.