Garage door won't open after a power outage? What to do

If the power is out, the opener cannot move the door, so pull the red emergency release cord and lift the door by hand. That only works safely if the springs are sound, and the door should lift with one hand. If the power is back and the door still will not open, the usual cause is that the opener is still disconnected from that release. After that, check in order for a tripped GFCI outlet or breaker, the lock button on the wall control, the photo eyes, a drained battery backup, and, least often, a logic board damaged by the surge when the power came back.

That order matters, because the first four cost nothing to check and cover most of the calls we get the morning after an outage. Below is how to open the door safely while the lights are off, what to check once they come back, and the few Colorado Springs details that make an outage here a little different.

While the power is still out: opening the door by hand

Every residential opener has an emergency release: a red handle on a cord hanging from the trolley, the carriage that rides along the rail above the door. Pulling it disconnects the door from the opener, and the door then moves on its springs like a door that never had an opener at all.

• Do it with the door closed if you can. A release pulled on an open door lets it drop under its own weight if a spring is weak, and the door is the heaviest moving thing in your house. If the door is stuck part way open, get a hand under it before you pull, or leave it alone.
• Pull straight down. One firm pull is enough. You will usually hear the trolley let go.
• Lift from the handle or the bottom section. Never lift by the joints between panels, which pinch fingers as the sections fold over the curve of the track.
• Feel the weight. A balanced door lifts with one hand and stays roughly where you leave it at waist height. If it takes both arms, or tries to slam back down, a spring is not doing its job. Stop, lower it gently, and leave it closed. Our guide to telling an opener problem from a broken spring covers what to look for.

One thing people forget: once the door is disconnected, the opener is no longer holding it shut. If you are leaving it released overnight or while you are away, lock it with the slide bolt on the inside of the door if it has one. If it does not, a C-clamp on the track just above a roller does the same job. Take the clamp off before anyone tries the opener again.

If you are on the outside with no other way into the house, the release is out of reach. Some doors have a keyed outside release fitted in the top panel for exactly this. If yours does not, the door waits for the power, or for a service visit.

The power is back and the door still won't open

Work through these in order. Each one takes a minute, and the list runs roughly from the most common cause to the least.

1. The opener is still disconnected

This is the most common one by a distance. The opener light comes on, the motor runs, the chain or belt moves along the rail, and the door does not budge. Nothing is broken. The trolley is still released from when someone pulled the cord.

To reconnect it, close the door fully by hand first. Then set the release handle back to its latched position. The tag on the handle, or the opener's manual, shows which way it goes, and it differs between models. Press the wall button: the carriage travels along the rail until it catches the trolley with an audible click, and from then on the opener drives the door again. If it runs the full length of the rail without catching, run it once more, because on some units the carriage only engages from one direction.

2. No lights at all: the GFCI outlet or the breaker

If the opener is completely dead, with no light and no response to the wall button, look at the outlet it plugs into before anything else. Garage outlets are often on a GFCI circuit, and GFCIs trip easily when power drops out and comes back. The reset button is not always on the garage outlet itself. It can sit on a bathroom or outdoor outlet on the same circuit, which is why people miss it. After that, check the breaker panel.

3. The wall button works but the remotes don't

Most openers made in the last twenty years keep their remote codes in memory through a power cut, so an outage rarely erases them. The usual cause is the lock or vacation feature on the wall control. It shuts out every handheld remote and keypad while the wall button carries on working normally, and it is easy to switch on by accident while feeling for the button in the dark. On most wall controls you turn it off by holding the lock button for a couple of seconds. If the lock is off and one remote still does nothing while the others work, try a fresh battery before you re-pair it.

4. The door starts down, then reverses, and the light blinks

That is the safety sensors, the pair of small photo eyes near the floor on each side of the door. Doors pushed open by hand in the dark, and cars moved around during the outage, knock them out of line more often than you would think. Each eye has an indicator light. If one is off or flickering, nudge that eye back until the light holds steady, and wipe both lenses.

5. The opener is beeping

If the opener has a battery backup, beeping and a flashing light usually mean it is either running on the battery or telling you the battery needs attention. After a long outage the battery may simply be drained and will recharge over the following day or so. If the beeping carries on well after power has been restored, the battery is likely at the end of its life. It is a replaceable part, and on most units swapping it does not mean replacing the opener.

6. It hums, clicks or does nothing after all of the above

A surge when the power returns can damage the opener's logic board, the circuit board that reads the remotes and the wall control. The signs are a unit that has power but behaves erratically, lights that flash with no motor movement, or a hum with no travel. At this point it becomes a diagnosis rather than a checklist. On a unit otherwise worth keeping, a board is usually a repair, not a reason to buy a new opener.

The Colorado Springs part

Outages here are rarely dramatic, but they are frequent enough that this question comes up every autumn. On September 25, about 1,000 homes around Stetson Hills lost power on a Friday evening before it was restored later that night. Wind knocks out lines through the fall. The city's average first freeze arrives around the start of October, and an early wet snow on trees still in leaf is the classic way a Front Range neighborhood loses power for a day.

Three local details are worth knowing:

• Cold shortens a battery backup. The backup battery sits in the opener in an unheated garage, and batteries deliver less in the cold. A backup that managed a handful of cycles in September may manage fewer on a January morning, so do not count on it for a long winter outage.
• A frozen bottom seal feels like a dead opener. After a day of melt and a hard night, the rubber seal can freeze to the slab. The opener strains and reverses, and a door lifted by hand tears the seal. Free it along the bottom edge first. A seal that keeps freezing is worth looking at during a maintenance and tune-up visit.
• Rural circuits come back later. Homes out toward Falcon, Peyton and Black Forest are often the last to be restored. If your garage is the only way into the house, it is worth knowing how the release works before the day you need it.

Five minutes now saves the scramble later

• Practise the release once with the power on, door closed: pull, lift, lower, reconnect. It is much easier in daylight than by flashlight.
• Find the GFCI reset that feeds the garage outlet and note where it is.
• Hang a flashlight near the release cord.
• Consider a battery backup if the garage is your main entrance. It is one of the features covered in our guide to choosing a garage door opener in Colorado Springs.

The short version

With the power out, pull the red release with the door closed and lift by hand, but only if the door feels light. When the power returns, first reconnect the trolley. Then check the GFCI and the breaker, the lock button on the wall control, the photo eyes, and the battery backup, in that order. If the opener still hums, clicks or does nothing, that is a job for garage door opener repair, and Eyal does the visit himself.

Frequently asked questions

Will a power outage erase my garage door remotes?

Rarely. Openers made in the last couple of decades store paired remotes in memory that survives a power cut. If the remotes stop working after an outage, check the lock button on the wall control first. It is far more often the cause than lost programming.

Is it OK to leave the door disconnected until the power comes back?

Yes, as long as you lock it. Once the release is pulled, nothing is holding the door shut, so use the inside slide lock or a clamp on the track. Reconnect the trolley once power is back, with the door closed.

Why won't my garage door reconnect after pulling the red cord?

Usually the release handle has not been put back into its latched position, or the door is not fully closed. Set the handle back as the tag shows, close the door by hand, and run the opener once or twice so the carriage can catch the trolley.

Do I need a battery backup opener in Colorado?

It is not required here. The law that made battery backup mandatory on new openers is California's, not Colorado's. It is still worth having if the garage is the way you get into your home, because it keeps the door running through a short outage without anyone touching the release.

My door is very heavy when I lift it by hand. Is that the outage?

No. The outage only stops the motor. A door that is hard to lift by hand has a spring problem, and it was there before the power went out. The opener was masking it. Leave the door closed and do not try to force it open.