The spring broke, and the opener kept getting pressed

What does the opener do to a garage door with a broken spring every time the button gets pressed?

It tries to lift the whole door alone. The spring carries a garage door’s weight, and the opener is sized to move a door that is already balanced. With the spring gone, every press puts that full weight on the opener’s drive, the arm on the top section and the lift cables. Replacing the spring is ordinary garage door spring repair in Tupelo, and that part stays the same however many presses followed the break.

In a lot of houses the bang happens with nobody near the garage, or it gets put down to something falling off a shelf. Then the next person heads out. Somebody presses the wall button on the way to work, the door moves a little and stops, and they try again because doors sometimes do that. Somebody else pulls in an hour later and works the visor remote. By the time anyone looks up at the shaft over the door, the opener has had several runs at a weight it has no business lifting.

So the visit has two parts, the spring and a short trail of what those presses did. What the door did on each try says where that trail runs.

How do you stop the next person in the house from pressing it?

Unplug the opener. In most garages it plugs into an outlet on the ceiling beside the motor head, and pulling that plug stops the wall button, every remote and the outside keypad at once. Then tell the household why the door is dead. That is the only hands-on step this situation needs.

Unplugging beats telling people not to press the button. Remotes ride around in more than one car, and a teenager coming home punches the keypad by the door without looking up. A dead opener stops all of them, and it does nothing to the door itself. If the plug needs a ladder, or the door is hanging open between you and the outlet, skip it and tell everyone instead.

If the door stopped partway up on one of those tries, leave it where it is. Do not pull the red release cord on it. That cord frees the door from the opener, and with the spring gone nothing else is keeping it up there. A door hanging open or stuck part of the way over the cars is what emergency garage door repair is for, and that page covers the wait.

Does it matter what the door did on each try?

Yes, more than how many tries there were. A door that moved a few inches and quit means the opener felt the weight and cut out, and that safety reaction usually spared it. A door that climbed partway and came back down put real strain on the cables and the bottom section. A door that never left the floor pushed most of the punishment back into the opener.

Ask whoever pressed the button what they saw. People remember this better than they expect to, since a door that misbehaves at seven in the morning tends to stick in the mind.

Moved a few inches and stopped, or stopped and reversed, is the good version. Openers have a force setting that cuts the motor when the door fights back harder than it should, and a dead-weight door trips it early. The gear inside still took a hard pull, but a short one.

Got partway up and then came back down is the rough one. On the climb the cables lost their tension, and on the way back down the door’s full weight rode on the opener with slack cable at the drums. That is the case for a close look at the cable drums and the bottom section.

Never got off the floor, with the motor running or straining for a second or two, is mostly an opener story. The door barely moved, so the cables and sections were spared, and the strain went into the gear and the motor.

What wears inside an opener that keeps lifting a dead door?

The parts that turn the motor’s effort into a pull on the door. Every press against a door with no spring loads them far past what they see on a balanced door, so the wear concentrates in a few places. Most of it is repairable. None of it is worth testing by pressing the button again to see if it still works.

• The drive gear or the sprocket in the motor head, which can lose teeth under a load that size
• The trolley, the carriage that rides the rail and holds the arm, which can crack or slip its connection under a pull it was not meant for
• A chain or belt stretched slack from hauling the full weight
• A motor that ran hot, sometimes with a warm electrical smell at the ceiling after the last try

These get checked as part of the same visit, and any fix that comes out of it falls under garage door opener repair.

Can the opener bend the top section of the door?

It can. The opener pulls on the door at one point, a bracket fastened near the top of the top section, and on a balanced door that pull is light. With no spring, the full weight of the door hangs from that bracket on every try. The usual sign is a crease or a bow across the top section beside the bracket, or a bracket that has pulled loose.

Stand inside with the light on and look straight across the top section from one side. A section that has started to fold shows a soft dip or a line running out from the bracket, and sometimes the skin around the bracket screws has pulled up into small dimples. A bracket that sits crooked, or screws that have backed partway out, say the same thing about where the load went.

What happens next depends on how far it went. A section with a slight bow and sound steel around the bracket can often be straightened and stiffened with a reinforcing strut across the back, with the bracket fastened through it so the next pull spreads along the strut. A section with a sharp crease, or torn steel where the bracket was, is finished, and the fix is a replacement section if the model is still made.

Why can the cables come off after the opener tried to lift the door?

On a healthy door the spring keeps both cables tight on their drums the whole way up and down. With the spring gone, nothing holds that tension. A door the opener hauls partway up and lets back down can leave slack wire at the drums, and a loose loop can jump the drum or wrap over itself on the way down.

The partway-up try described earlier is the one that matters here. A door that never got off the floor rarely throws a cable, since the cable never had room to go slack. A door that climbed a few feet and came back down had that room twice.

Often the cables look fine from the floor and only show the trouble once the spring is replaced and the door starts to move under tension again, so they get checked before the new spring is wound. If one side of the door already sits lower than the other, the cable has come off, and what a crooked door off its track means covers that case.

Does the opener need replacing after it lifted a door on a broken spring?

Rarely. On an opener that ran fine before the spring broke, the usual damage is a stripped gear or a worn trolley, and those are repairs in the $95 to $250 range, done while the door is already apart for the spring. A stretched chain or belt gets taken up or replaced on the same visit.

Two findings change that. A motor that smelled hot on the last try, or a board that stopped answering the wall button and the remotes after the episode, can still be repaired on some units. That is also where a new opener gets priced against the fix, with both numbers on the table before anything is ordered.

The spring half of the bill does not move with any of this. A pair of torsion springs on a standard two-car door runs $220 to $350 whether the opener needed nothing or a new gear, and what spring and opener repairs cost in Tupelo lists both jobs beside the rest of the common repairs.