How to Fix a Broken Garage Door Spring

Garage door springs can be a very dangerous home maintenance project for a person to undertake. The springs on garage doors have an extreme amount of pressure on them. If they don't have a safety cable in the middle when they break, one can literally go through a wall. To avoid this danger, it is best to let a repairman fix the problem, but if that is not an option it can be done with a few precautions.

Things You'll Need

  • New springs
  • Clamps
  • Wrench

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Raise the garage door so that there will be the least amount of tension on the springs.

Place a clamp under the bottom roller below the door on the side where the broken spring is located. This will keep the door from falling. Garage doors can be heavy without the assistance of a spring.

Remove the broken spring from the door. It is attached to a pulley on one end and the garage door track on the other by hooks. Simply remove the safety cable and the spring, and take it with you to the store to buy the new one.

Replace the broken spring by copying the way the other spring is attached. Make sure that the sheaves are not stretched more than an inch apart while the door is up. The spring will stretch out as the door goes down, and if it is stretched too far before the door is lowered, it could break when the door is down. If the garage door is still heavy when installation is over, it can be undone and the spring can be stretched a little more as long as you make sure the sheaves are not stretched more than a couple inches max when the door is up.

Tips & Warnings

  • Make sure to reattach the safety wire inside the springs after they are installed. This will keep them from damaging anything if they ever break again.
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