How to Open a Garage Door Without Power (and Reconnect It After)

November and December storms can knock out power across the Twin Cities with little warning, and an opener without power is just a motor holding your door shut. Most residential openers have a manual release so you can still get the car out. Here's how to use it safely, keep the house secure while the door is disconnected, and get everything working again afterward.

Before you pull the release

Take 30 seconds to check:

1. Is the door fully closed? Chamberlain's owner's manuals say to use the emergency release only when the door is closed if possible. Weak or broken springs or an unbalanced door can make an open door fall rapidly and unexpectedly.
2. Is the doorway clear? The same manuals say never to use the release unless the doorway is clear of people and obstructions. Keep kids and pets back.
3. Do the springs and cables look intact? Use a flashlight. A torsion spring with a visible gap, or a cable that's loose or off its drum, means the door isn't balanced.
4. Is the door frozen to the floor? In a cold snap the bottom seal can freeze to the concrete. Don't force it. See garage door frozen to the ground.

How to open the door by hand

On most chain, belt, and screw-drive openers mounted on the ceiling:

1. Find the emergency release. It's usually a red cord with a handle hanging from the trolley on the opener rail, near the door.
2. Pull it straight down firmly. On Chamberlain and LiftMaster openers you'll feel or hear the trolley release arm snap into position. That disconnects the door from the opener.
3. Lift the door from the bottom, using a handle or a solid gripping point on the bottom section. Never put your fingers between the sections, and never pull the door by the release cord. Chamberlain warns the rope or knot can give way.
4. Watch how it moves. A balanced door should lift with moderate effort and stay put partway open. If it's very heavy, slams down, or creeps shut, lower it carefully and stop using it.
5. Lift it all the way open before you drive under it, and keep everyone clear while the car moves.

Wall-mounted (jackshaft) openers mount beside the door instead of on the ceiling, and their release works differently. Check the manual or the label on the unit.

No other way into the garage?

If the garage has no service door and the overhead door is your only way in, you can't reach the release from outside. LiftMaster's manual describes an outside quick release accessory for exactly this case. It's worth asking about before winter, along with a battery backup (below).

Keep the house secure while the opener is disconnected

When the door is disconnected, the opener isn't holding it closed. Depending on your door, someone outside may be able to lift it.

• Close the door by hand when you're done and make sure it's all the way down.
• Use the door's manual lock if it has one. Many doors have a slide bolt or lock on an inside section. If you use it, unlock it before you run the opener again. Running an opener against a locked door can damage the door or opener.
• Lock the house door that leads into the garage, especially for an attached garage.
• If the door won't close all the way and you can't secure it, see garage door stuck open and emergency garage door repair.

Reconnect the opener when the power is back

On many Chamberlain and LiftMaster openers, the owner's manual says:

• Normal release: with the door closed, press the wall control (door control push bar). The trolley reconnects on the next up or down run.
• Lockout position: if you pulled the handle down and back toward the opener, the trolley is locked out so you can move the door by hand as often as you like. To undo it, pull the handle straight down. The trolley reconnects on the next up or down run, whether you move the door by hand or use the wall control or a remote.

Other brands work differently. Some have a carriage lever you set before the carriage re-engages the chain or belt, so check your opener's manual.

If the opener runs but the door doesn't move, it's usually still disconnected. If nothing happens at all, check the breaker and any GFCI outlet in the garage. Outages and surges can trip them. Then work through garage door won't open. If the remote or keypad stopped working after the outage, see remote or keypad not working.

After reconnecting, run the door through one full cycle and watch it. A new grinding noise, a door that reverses, or a slow, straining opener should be checked. See opener straining in winter.

Generators and carbon monoxide

If you're running a portable generator during an outage, never run it in the garage, even with the overhead door open. The CDC says to use generators only outside, more than 20 feet from windows, doors, and vents, and to use a battery-powered or battery-backup carbon monoxide detector in your home. The CDC also says never to leave a vehicle running in an enclosed or partially enclosed space such as a garage. If you're warming up the car during a cold outage, back it out first.

Plan ahead: battery backup

Some openers include or offer a battery backup that keeps the door working for a while during an outage, so you may not need the manual release at all. If yours doesn't have one and outages are a real hassle for your household, ask about it when you compare openers. Our opener repair and replacement page covers the main opener types. Also, make sure everyone who drives knows where the release cord is and how to use it safely.

When to call for help

Request help if:

• The door is heavy, crooked, or won't stay up when disconnected. That usually means a spring or cable problem.
• The door is stuck open and you can't secure the house. Choose "ASAP" or see emergency repair.
• The opener won't reconnect, or it runs, hums, or strains without moving the door after power returns.
• The release cord or handle is missing, frayed, or broken.

Getting help in the Twin Cities

Twin Cities Garage Door SOS is a free referral service for homeowners. We're not a repair contractor. When you send a request, we pass it to one independent local garage door company that serves your ZIP code, and that company contacts you with its availability and price. We cover Minneapolis, St. Paul, and suburbs such as Bloomington, Plymouth, and Woodbury. See all service areas and how it works.

Sources

• Chamberlain / LiftMaster, Model 2500B owner's manual ("To Open the Door Manually," lockout feature, power-failure troubleshooting, outside quick release accessory)
• Chamberlain / LiftMaster Professional, 3265-267 owner's manual (emergency release warnings)
• CDC, "What to Do to Protect Yourself During a Power Outage"
• CDC, "Carbon Monoxide (CO) Poisoning Basics"