Storefront Door Won’t Lock at Closing Time: What Should You Do?

It tends to happen at the end of the day. The register is closed, and the key that has locked the front door every night will not finish its turn. Sometimes the key turns but the door still pulls open.

Most storefront doors are aluminum and glass, and many lock with a bolt in the narrow edge of the door that swings or slides into the frame, or into the other door of a pair. When that bolt cannot enter the strike opening, the cause may be the lock, the position of the door, or both.

This check applies to a mechanical storefront lock with a bolt you can see. If your entrance uses a push bar, an electric strike, or a keypad-controlled release, it works differently, so describe that hardware when you call.

Open the door, hold it steady, and turn the key or the thumb turn as if you were locking up. Watch the edge of the door. On a working lock, the bolt comes out fully and the key finishes its turn without effort. Pull the bolt back in completely before you close the door again, so it does not strike the frame.

The result helps narrow down the problem. If the bolt comes out cleanly with the door open, the position of the door is probably involved, although the lock may still need attention. If the bolt does not move, comes out only part of the way, or the key spins without doing anything, something in the lock has failed. The check will not show which part, but it gives the locksmith a useful starting point.

A storefront door is heavy, and it opens and closes hundreds of times a day. Over time the door moves a little in its frame, and the bolt starts catching the edge of its opening. There are a few common reasons, and more than one can be present at once.

Some signs change the situation. If the glass is cracked, the door is scraping the floor, or a pivot or hinge looks loose, stop working the door and call. A heavy glass door with a loose fitting should be left alone until it has been looked at.

Many storefronts have a pair of doors. On some pairs, one door opens for customers all day and the other is held shut by small bolts at its top and bottom that slide into the frame and the floor. The lock on the working door throws its bolt into that second door.

Where the entrance is built that way, bolts that have been left undone or have slipped leave the second door unanchored. The key turns and the lock appears to work, but both doors pull open together. Push gently on the second door. If it moves, its bolts need to be seated before the pair will hold. This does not apply to pairs fitted with push bars or other exit hardware, which are secured differently.

If the lock fails with the door open, the fault is in the lock itself, and the way the key behaves offers a clue to where it is. These are faults commonly found on aluminum storefront doors.

In each of these cases, avoid forcing the key. Forcing it can break the key and add extraction work to the repair.

If the door will not lock, a few steps reduce what is exposed while you arrange a repair. None of them secures the entrance, so treat them as a way to limit risk and not as a substitute for a locked door.

While anyone is still inside, the door has to stay usable as a way out, so do not chain or block it. If the entrance still cannot be locked, it is not safe to treat the building as secured. Have someone stay on site until the lock can be repaired.

Much of this work is adjustment. A loose cylinder is reset and secured. A door that has dropped is brought back into line at its pivots, and the opening for the bolt is adjusted so the bolt lands cleanly. A closer that is out of adjustment is reset, and one that is leaking or damaged is replaced.

Replacement may be needed when the lock body inside the door has broken or the bolt is worn. On these doors the lock body and the key cylinder are separate parts, so a new lock body can often be fitted behind the cylinder you already have. If the visit shows that the hardware is past repair, or that too many keys are in circulation, it is worth deciding at the same time whether to rekey, replace, or upgrade your business locks.

It also helps to know who to call. The lock, the cylinder, the pivots, the strike, and the closer are locksmith work. Cracked glass or a bent frame needs a glass or storefront company.

Before the technician leaves, lock and unlock the door several times with it fully closed, using the key from outside and the thumb turn from inside. Let the door close by itself and confirm that it shuts completely. On a pair, check that the second door stays closed when you pull on the handles.

If your front door will not lock, Texas Locksmith Pros repairs the locks, pivots, strikes, and closers on aluminum and glass storefront doors, including commercial lock repair in Dallas. We are open Monday to Saturday, 7 AM to 10 PM. Call (972) 544-4699 and tell us whether it is a single door or a pair, what the key does, and whether the bolt moves with the door open.