Every November in Richmond, I get the same call multiple times in a single week: "My power's out and I can't get my car out of the garage."

The fix is a red cord hanging from the opener. Every opener has one. Most homeowners have never pulled it.

This post is what the red cord does, how to use it safely, and the one thing you should never do with it during a windstorm.

What the red cord is

The opener doesn't drive the door directly. It drives a trolley that runs along a rail (chain-drive, belt-drive, or screw-drive depending on the opener type). The trolley is connected to the door via an arm.

The red cord disconnects the trolley from the arm — or more accurately, disconnects the trolley from the opener's drive mechanism. After you pull the red cord, the trolley still sits in the rail, but it slides freely. The door can be lifted by hand because it's no longer attached to the opener's motor.

This is the manual release. UL 325 requires it on every residential opener. It's been standard equipment since the 1980s.

How to use it

With the door closed and the power out:

  1. Find the red cord. It hangs from the trolley, usually 50–80 cm down from the ceiling. The handle is bright red, often shaped like a tear-drop or a knob.
  2. Pull the cord downward and slightly toward the door. You'll hear a click. The trolley is now disengaged.
  3. Reach up under the door, grab the bottom, and lift. The door should lift smoothly with moderate effort. If it's heavy, your springs are wrong (post 13 — do the tilt test before the next outage).
  4. Lift to fully open. The door will stay there if the springs are balanced.
  5. Drive out.
  6. Close the door manually by reaching up and pulling it down. Make sure it lands fully on the floor.

To reconnect to the opener when power returns:

Most modern openers: simply run the opener. The trolley will engage automatically as it passes the disconnected arm.

Older openers: pull the red cord toward the opener motor until you hear a click. The trolley is re-engaged.

The DANGER scenario

Here's the part that gets people hurt.

Do NOT pull the red cord when the door is fully or partially open without the opener supporting it. If the springs are weak, broken, or out of balance, the door is being held up by the opener. Disconnect the opener with the door above the floor, and the door will fall.

A 65-kg double sectional door falling from fully-open height onto a person's head, hand, or foot causes serious injuries. This happens every year somewhere in North America. The trade publications track it. The pattern is: power out, customer panics, customer tries to "release" the door while it's stuck partway up, door falls.

DANGER The safe way to use the manual release: door fully closed, door already on the floor, power out. Pull the red cord. Lift the door manually.

The unsafe way: door open or partially open, pull the red cord, trust the springs to hold the door. If the springs are weak (and you don't know they are until you're hanging on the cord), the door comes down.

If your door is stuck partway up during a power outage, do not pull the red cord. Either: 1. Wait for power to return. 2. Have somebody support the door's weight from below while you pull the cord and they lower it manually. 3. Call somebody to assess.

The battery-backup option

Several modern openers include or support battery backup. The battery (typically a 12V lead-acid pack inside the opener housing) takes over when grid power fails. The opener runs normally on battery — typically 15–25 cycles of operation.

LiftMaster 8550W: integrated battery backup standard. Chamberlain B6713T: integrated battery backup standard. LiftMaster 8160W: battery backup optional (~$185–$285 add-on).

In Richmond, where windstorms knock out power for 1–6 hours roughly 3–6 times per fall and winter, battery backup is one of the few opener upgrades I recommend without reservation. The first power outage after install pays for it in convenience and avoided "I can't get to work" stress.

Most batteries in these systems are good for 3–5 years before needing replacement. Replacement battery: $85–$165 for the pack, takes 15 minutes to swap.

What NOT to do during a windstorm

I'm putting this in its own section because every November somebody does it.

Do not open the garage door during a high-wind warning.

The door is the largest unsealed opening on most Richmond houses. When you open it during a windstorm, you're allowing pressure differentials inside your garage that can:

The classic Richmond failure mode: customer wants to "test" the door during a windstorm, opens it briefly, gusts hit the underside of the now-horizontal panel, springs torque sideways, door panels crease, door slams down on the cars.

I had this exact call from a customer near Cambie Road and Garden City in West Cambie three years ago. A 100 km/h gust off the airport caught his door at the wrong moment. Door panels separated mid-cycle. The panels landed on his Subaru. Total replacement cost (door + bodywork): $7,840.

If you need to use your garage during a windstorm and the door is closed, leave it closed. Walk in through the people-door. Move what you need by hand. The door will be there in the morning.

What I keep on my truck for outage calls

When I get the November-power-outage call, here's what I bring:

The call is $185–$285 for after-hours response in most Richmond neighbourhoods. If the only issue is "I don't know how to use the red cord," I'll walk you through it on the phone for free.

Cost reality check (2026, Lower Mainland CAD) - After-hours service call (power outage, customer can't get out): $185–$285 plus parts if any - Walk-through over the phone: free - Battery backup add-on to existing opener: $245–$385 installed - Battery replacement on existing battery-backup opener: $125–$225 - New opener with battery backup included (LiftMaster 8550W): $895–$1,295 installed - Spring rebalancing (if outage reveals heavy door): $185–$285 service call

A West Cambie story

A guy near Alderbridge Way and Cambie Road in West Cambie called me at 6:40 a.m. on a Sunday in November 2024. Power had been out since 2 a.m. due to a windstorm. He had a flight at 11:00 and his car was stuck in the garage.

I talked him through the red cord on the phone. Took about 3 minutes. He was on the road by 7:00. Made his flight.

He insisted on paying me for the call. I said no, since I didn't drive out. He sent a $50 e-transfer anyway and a note that read "for next time somebody calls and you talk them through it for free." That money has paid for a few coffees for myself and the next guy in the same situation.

The red cord is the single most useful piece of equipment in your garage you've never used. Once a year, test it. Pull it. Make sure it disconnects. Lift the door. Make sure it goes up and stays up. Reconnect.

That's the post.

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