Trouble Shooting a Garage Door That Wont Stay Closed Adjusting the LimitTravel Setting. So there you have it. How To Fix A Door That Won T Stay Closed 7 Simple Steps Doors Door Repair Front Door Handles As the metal in your garage door system expands and contracts it may shift the safety sensors. Garage door won t stay down . The travel controls how far the door goes up and down. In connection with the limit setting the sensor for your garage door could be. You just need to adjust the travel setting on your door opener. Garage Door Sensors Misaligned. Overtime the electrical connections. It passes a beam a few inches off the floor from side to side. They can be a contributing factor when your garage door wont going down wont stay shut and wont opening all together. When the green indicator light glows steadily tighten the wing nut. If your garage door opens ok but wont close then its possible the safety reversing sensors are not correctly aligned. When yo...