How to Fix a Garage Door That Won't Close

Garage doors are the heaviest moving objects in your home, and they rely on a delicate balance of tension, sensors, and tracks to function safely. When a door refuses to close—often reversing immediately or staying stuck mid-travel—it is almost always triggered by the safety eye sensors detecting an obstruction or losing their electronic handshake. Before calling in professional help, a systematic check of your sensors and track debris will solve the majority of these malfunctions. Performing this maintenance yourself requires patience and a healthy respect for the spring tension involved. Never attempt to adjust the springs or cables yourself, as these are under immense pressure and can cause serious injury. Focus your energy on the simple electronics and physical obstructions first; if the door still struggles, the issue likely resides in the motor limit settings or structural hardware that requires a steady hand and specific alignment tools.

  1. Remove Track Debris First. Inspect the vertical and horizontal tracks for debris, dried grease, or small objects like pebbles. Use a stiff brush or a damp cloth to remove any buildup that prevents the rollers from gliding smoothly.
  2. Align the Safety Eyes. Locate the two photo-eye sensors near the floor on either side of the door. Ensure they are facing each other directly and that the indicator lights are solid, not blinking.
  3. Wipe the Sensor Glass. Wipe both glass lenses with a clean, dry microfiber cloth. Dirt, cobwebs, or moisture can block the infrared beam, causing the opener to think something is in the way.
  4. Check Wire Connections. Inspect the low-voltage wires running from the sensors to the motor unit. Look for any loose connections, frayed insulation, or wire staples that may have pinched the cord too tightly.
  5. Feel for Mechanical Resistance. Pull the manual emergency release cord to disconnect the door from the opener. Lift the door manually to see if it moves smoothly or feels heavy and stuck at a certain height.
  6. Fine-Tune the Motor Force. If the door stops for no reason, locate the 'Force' or 'Travel' adjustment screws on the back of the motor unit. Turn them slightly clockwise to increase the power required to close the door.