Q. The elevator door opens and closes even though no one is pressing the button. If the elevator you take has this problem, it may be due to the following reasons: 1. Abnormal sensing near the elevator’s safety door or safety light curtain 2. There is foreign matter stuck in the door track or there is too much dust. 3. The buttons on the control panel are stuck or the contacts are faulty. Additional knowledge: Safety light curtain is a light-based elevator door safety protection device that c...