How to Use the Garage Door Manual Release Safely
The red manual release cord disconnects the door from the opener so it can be moved by hand. Only pull it with the door fully closed. On a door with a broken spring, releasing it while the door is raised lets the door fall under its own weight.
What it does
The opener is connected to the door through a trolley that rides on the rail. The manual release disconnects the door arm from that trolley.
Once released, the door is free of the opener and can be moved by hand, which is what you want during a power cut or when the opener has failed.
The safety rule
Only pull it with the door fully closed.
With working springs, a released door is balanced and will stay where you put it. With a broken spring, the springs are no longer holding anything, and the only thing keeping a raised door up is the opener. Disconnecting it lets 130 to 350 pounds come down.
If the door is up and you think a spring has broken, do not pull the release. Bring the door down with the opener if it will, or get help and a way to support it.
During a power cut
- Make sure the door is closed.
- Pull the release cord down and back until it clicks.
- Lift the door by hand. It should feel like twenty or thirty pounds.
- Prop it if you are leaving it up for any length of time.
- When power returns, close the door fully and re-engage.
If the door is very heavy at step three, the springs are tired or broken. That is worth knowing regardless of the power cut.
Re-engaging
Close the door fully by hand. Then run the opener with the remote or wall button. The carriage travels along the rail and clicks back into the trolley as it passes.
Some models require pushing the release lever back towards the door first. If yours does not re-engage after a full cycle, check the lever position.
Once re-engaged, run the door through a full open and close and watch that it stops in the right places.
Where the cord should hang
No lower than six feet from the floor.
This is a genuine safety point rather than a formality. Children pull hanging cords, and a door with a broken spring that is released while up will fall.
If yours hangs lower, shorten it. If your garage has an exterior emergency release, which is a keyhole in the top of the door with a cable to the trolley, think about whether you actually need it, because it is also a way in.
The thing worth noticing while you are down there
Every time you use the release, take ten seconds to test the balance: lift the door to waist height and let go.
If it stays, the springs are fine. If it sinks or drops, they are not, and you have just found out before the door found out for you.
Related questions
How do I re-engage it?
On most openers, pull the door fully closed by hand, then run the opener. The carriage travels along the rail and clicks back into the trolley. Some models need the release lever pushed back towards the door first.
Can someone open my door from outside using the release?
On a door with an emergency release accessible through the top of the door, yes, which is why that feature is uncommon on modern installations. If your garage has an exterior release keyhole, keep the key somewhere sensible and consider whether you need it.
Should the cord hang low so I can reach it?
No lower than six feet from the floor. Children pull them, and a released door with a broken spring drops.