How To Troubleshoot a Garage Door That Won’t Close All the Way
A garage door that won’t close all the way is a security risk to your home, belongings, and family. It usually indicates mechanical problems or issues with the garage door sensor, and should be addressed immediately. Knowing how to deal with this problem and when to get professional garage door services can save you money and stress. Explore troubleshooting tips and learn reasons why your garage door is not closing fully.
Signs Your Garage Door Isn’t Closing Properly
The most obvious sign that something is wrong with your garage door is when it doesn’t close all the way, leaving a gap between the door and the floor. However, there are other signs that a garage door isn’t closing properly:
- Strange noises: A garage door should never make extremely loud, banging, clanking, grinding, or screeching sounds.
- Reversing: This is when your garage door closes, then opens again during the closing cycle.
- Starting and stopping: A garage door’s operation should be smooth without abrupt starts and stops.
- Uneven sealing: Gaps in your garage door allow moisture, air, and pests to enter.
- Blinking opener: The garage door opener may start to blink in random patterns, indicating error or safety codes.
Top Reasons a Garage Door Won’t Close All the Way
Why won’t your garage door close? Some issues are easier to identify than others, and some depend on the type of garage door you have.
Safety Sensor Misalignment
Most garage doors have safety sensors at the bottom of the door tracks. These sensors create an imaginary line between each side of the door. If anything crosses this line, the door will stop closing and reverse direction. Over time, sensors can become misaligned due to accidental bumps, wear and tear, and vibrations.
Obstructions in the Door’s Path
If an obstruction is in the way of the sensor line, such as dirt, rocks, leaves, tools, or other objects, the garage door won’t close.
Track Misalignment
If the metal tracks that guide your garage door up and down become bent, shifted, or warped, the door may seize up. Misalignment can occur due to damage from a car collision, loose bolts, or normal wear and tear.
Damaged Rollers or Cables
The rollers and cables work with the spring system to guide your garage door. If they become bent, warped, or damaged, the door can seize up or fall down, creating a dangerous environment.
Opener Limit Settings
Your garage door opener has adjustable settings that determine how far the door travels on the tracks. Incorrect settings may cause the opener to believe the door is closed when it is still open.
Cold Weather or Debris
Cold weather can cause metal to contract and lubricants to harden, while ice buildup can prevent the door from closing fully.
How To Troubleshoot the Issue
How do you fix a garage door that’s not closing? Here are a few garage door troubleshooting tips to get your door back on track.
Inspect and Realign Safety Sensors
Check the safety sensors near the bottom of the garage door to ensure they’re aligned. A blinking light indicates misalignment, while a solid light means they’re properly aligned.
Clear Obstructions
Remove objects blocking the sensor line. Sweep the area to clear dirt, leaves, or debris.
Lubricate Tracks and Rollers
Use a lightweight machine oil or silicone spray to lubricate tracks, rollers, hinges, and other moving parts. Avoid heavy grease that can attract dirt.
Check Remote and Wall Switch
Test both the remote and wall switch. If the door only works with one, replace the remote batteries or have the wall switch wiring inspected.
Reset the Opener System
Unplug the opener for 30 seconds, then plug it back in to reset the system.
Adjust Travel and Force Settings
If you’re comfortable, adjust the screws and dials on the opener motor in small increments. If unsure, contact a professional—incorrect adjustments can create hazards.
Preventive Maintenance Tips
Homeowners should regularly maintain their garage door to prevent issues.
Regular Garage Door Tune-Ups
Schedule a professional tune-up at least once a year. This ensures your garage door is safe, efficient, and up to code.
Lubrication Routines
Lubricate hinges, rollers, springs, and tracks every 3–6 months. Avoid over-lubrication, which attracts dirt.
Visual Inspection Schedule
Inspect your garage door monthly for obstructions, frayed cables, or damaged parts.
Replace Worn Parts Early
Replace broken or worn parts promptly. If unsure how to install new parts, schedule service with a professional.
Contact Mesa Garage Doors Today
Mesa Garage Doors is your trusted local repair company in Southern California. If you’re considering upgrading your garage door or need maintenance service, contact us today for a free consultation and estimate.