With the door fully closed, pull the emergency release cord on the opener's trolley and lift the door by hand from the bottom section. Do it only if both springs are intact and both cables sit on their drums. A balanced door lifts with moderate effort and stays put. To reconnect, close the door and run the opener, or pull the cord toward the opener until it clicks.
Key takeaways
- Pull the release only with the door fully closed, both springs intact and both cables on their drums.
- If the door is open, crooked or very heavy, leave it where it is and call.
- Chain and belt openers release at the trolley, screw drives at the carriage, wall-mount openers at the motor beside the door.
- Most openers reconnect on the next open and close once the power is back.
- A garage that is the only way into the house needs a keyed emergency release on the outside of the door.
When the power goes out, an opener without a working battery stops where it is. The door still works by hand, because the springs carry its weight. Getting it open safely comes down to three checks, one cord and knowing which kind of opener you have.
If the opener has battery backup, try the remote or the wall button first. California has required battery backup on residential openers sold or installed since July 1, 2019, so newer units often keep running through an outage. Our battery backup law guide explains what the law covers. If the power is on and the door still will not move, start with the two-minute safe checklist instead.
Read this before you pull the cord
Safety first. Never unwind, adjust or remove a torsion or extension spring, a lift cable, a cable drum or a bottom bracket. Never run the opener with a broken spring or a snapped cable. Keep people and pets out from under a door that is crooked or jammed.
Pull the release only when all three of these are true:
- The door is fully closed.
- Both springs are intact. The torsion spring above the door shows no gap of about two inches in its coil, and extension springs along the tracks are connected, not hanging loose.
- Both cables are on their drums. The lift cables run tight up from the bottom corners of the door, and the door sits level on the floor.
If the door is open, crooked or feels very heavy, stop. Leave it where it is, keep everyone clear and call. Read what to do when a spring breaks while you wait.
Why does a door drop when a spring is broken?
The springs lift the door. The opener only guides it. A two-car steel door commonly weighs well over 100 pounds, and the springs are wound to offset almost all of that, which is why a balanced door moves with one hand.
When a spring breaks, the weight has nowhere to go but the opener. If the door is open, the trolley connection may be the only thing holding it up. Pull the release and the door can come down at full weight, fast. Chamberlain’s own instructions warn that a door with weak or broken springs may fall rapidly and without warning, and the CPSC’s homeowner checklist starts the same test with the door closed. That is why the release belongs to a closed door.
Which opener do you have?
Every residential opener has a release that separates the door from the drive. Where you find it, and how it latches back, depends on the drive. Not sure which you have? See how to identify your opener.
| Opener type | Where the release is | To disconnect | To reconnect |
|---|---|---|---|
| Chain or belt drive | A cord with a red handle hanging from the trolley on the rail | Pull straight down | Pull the cord toward the opener, or straight down on some rails, then run the opener until the trolley latches |
| Screw drive | A cord hanging from the carriage on the screw rail | Pull straight down | Pull the cord toward the opener until it clicks, then run the opener |
| Wall-mount (jackshaft) | A handle or cord on the motor unit beside the door, at the end of the torsion tube | Pull down firmly until it clicks | Pull down again until it clicks, then run the opener |
Details vary by model. If the trolley or the motor carries a label with its own steps, follow the label.
How do you open the door by hand?
1. Unlock the door
If the door has a slide bolt or a T-handle lock, open it. Lifting against a lock can bend the top section, and a lock left engaged is one of the causes on the will not open page.
2. Pull the release
Pull the cord or handle as the table shows. On a chain or belt opener you will feel the trolley let go of the door. The door does not move yet.
3. Lift from the bottom
Use the lift handle, or flat hands on the bottom section, away from the joints between sections, where fingers get pinched. A balanced door rises smoothly with moderate effort. Lift it all the way, until it stops.
If it feels very heavy, drops when you ease off, or one side rises ahead of the other, lower it gently to the floor and leave it closed. That is a spring or cable problem, and the heavy to lift page explains why.
4. Leave it fully open or fully closed
A balanced door stays open on its own. Never leave a released door partway open, and do not drive or walk under one that drifts down.
How do you reconnect the opener?
Once the power is back, close the door by hand, gently, all the way to the floor. Then reconnect it for your type of drive.
Chain and belt trolleys
On many openers you simply run the opener: the trolley travels along the rail and latches onto the carriage on the door. Chamberlain and LiftMaster openers with a square rail want the cord pulled toward the opener first, and T-rail models want it pulled straight down. Genie trolleys latch when you pull the cord up toward the motor until it clicks.
Screw drives
On a screw drive, the carriage latches back onto the part that rides the threaded rod. Pull the cord toward the opener until it clicks, then run the opener through one full open and close.
Wall-mount openers
A wall-mount opener turns the torsion tube directly, so there is no trolley to catch. Pull the release handle down until it clicks and run the opener. The door reconnects on the next run up or down.
If the opener runs and the door does not move after two tries, the trolley or the drive gear is usually at fault, and our opener runs but the door stays page covers it. If the opener will not start at all once the power returns, Genie’s instructions suggest unplugging it for up to 30 seconds. If that does not wake it, it needs opener repair.
What if the garage is the only way in?
The release cord only helps when you are inside. If the garage is the only door into the house, a keyed emergency release solves the outside problem: a small key lock on the door, linked by a cable to the trolley, that lets you disconnect the opener from the driveway. We fit them as part of our garage door lock work.
A released door is no longer held shut by the opener, and anyone can lift it. If you leave it disconnected overnight, engage the slide lock if the door has one, and remember to open it before you run the opener again.
Across San Diego
In Rancho Bernardo, the garage is the main way in and out for a lot of households, and not everyone can lift a door by hand, so battery backup or a keyed release is worth having before the next outage. In Escondido and other inland areas, an outage during a Santa Ana wind event is exactly when you need the car out quickly, so find your release cord before fire season. In Kensington and Talmadge, detached single-car garages at the end of the driveway sometimes have no other door at all.
Next step
If the door would not lift easily, would not stay open or would not reconnect, leave it closed and book opener repair. Tell us which step it failed at and send a photo of the springs, and we will know what to bring. If a spring turns out to be broken, the visit becomes spring replacement instead.
Rather have a technician look at it?
We repair garage doors across San Diego County, same day in most cases, with the price agreed before we come out.
Frequently asked questions
How do I open my garage door from outside when the power is out?
Only with a keyed emergency release: a small key lock on the door, linked by a cable to the opener's trolley. Turn the key to disconnect the opener, then lift the door from the bottom, as long as the springs and cables are intact. Without one, there is no safe way in from outside. If the garage is the only door into your home, have one fitted.
Why won't the trolley latch back on after I pulled the release cord?
Usually the release has not been reset, or the trolley has not traveled far enough to meet the door's carriage. Pull the cord toward the opener, or straight down on some rails, then run the opener through a full open and close. If the motor runs but nothing catches after two tries, the trolley or the drive gear has likely failed.
Can I leave my garage door disconnected from the opener?
For a while, yes, but the opener no longer holds the door shut, so anyone outside can lift it. Engage the slide bolt or T-handle lock if your door has one. Open that lock again before you run the opener, because an opener pulling against a locked door can bend the top section.
How do I release a wall-mount garage door opener?
A wall-mount, or jackshaft, opener sits on the wall beside the door and turns the torsion tube directly, so it has no trolley. Its release handle hangs from the motor unit. With the door fully closed, pull the handle down firmly until it clicks, then lift the door by hand. Pull it down again and run the opener to reconnect.
Where is the emergency release on a screw drive garage door opener?
On a screw drive, the release cord hangs from the carriage that rides the long threaded rail, close to the door end when the door is closed. With the door fully closed and the springs and cables intact, pull the cord straight down to free the carriage. To reconnect, pull the cord toward the opener until it clicks, then run the opener through a full cycle.
Sources
- How to Manually Open or Close a Garage Door, The Chamberlain Group (Chamberlain and LiftMaster support)
- The Power is Out: How to Open Your Garage Door Manually, The Genie Company
- Non-Reversing Automatic Garage Door Openers Are a Hazard (Publication 523), U.S. Consumer Product Safety Commission