The doors follow a timed sequence
An elevator’s door buttons do not usually control the doors directly. The elevator controller—the system coordinating the car, doors, and calls—runs a sequence: the car arrives and levels with the floor, the doors stay open for a set interval, and then they close. Pressing Close may not shorten that interval, because the controller is programmed to preserve time for passengers to enter or exit.
That pause matters especially for riders who move more slowly, use mobility devices, or need extra time to clear the doorway. Accessibility requirements set minimum door-opening times in covered elevators. The button can therefore register a press without immediately changing what the doors do: the request is effectively queued until the required interval has passed. Exactly how the button behaves depends on the elevator’s design and configuration.
Closing is separate from sensing an obstruction
The close button and the door’s safety sensors do different jobs. The button asks the controller to start closing; sensors at the entrance detect a person or object in the doorway and can make the doors stop or reopen. A door that ignores a close-button press may still be responding normally to its timing rules, not failing to recognize the button.
Once the minimum open time is over, the doors can close on their own, or a close-button press may help them do so sooner. The practical result is simple: pressing the button repeatedly cannot reliably make an elevator leave faster, but waiting through the pause gives other riders the time the system is designed to protect.
