Garage Door Won't Close
Troubleshooting Guide

90% of won't-close issues are misaligned sensors (5-minute fix). Follow our step-by-step troubleshooting guide to diagnose and fix the problem yourself - or know when to call for professional help.

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Quick Fix: Sensor Realignment (5 Minutes)

Try this first - fixes 90% of won't-close problems:

  1. 1. Locate photo-eye sensors (small black boxes on each side of door, 4-6 inches from floor)
  2. 2. Check LED lights on sensors (one green, one red/orange typically). Blinking = misaligned
  3. 3. Clean sensor lenses with soft cloth (spiderwebs and dirt block signal)
  4. 4. Make sure sensors point directly at each other (loosen mounting screws, adjust angle)
  5. 5. LED lights should become solid (not blinking) when properly aligned
  6. 6. Test: Try closing door - should work normally if sensors aligned

Troubleshooting Checklist

Sensor Alignment

Test: LED lights solid (not blinking), sensors point directly at each other

Fix: Loosen mounting screws, adjust sensor angle until LEDs solid, tighten screws

Easy - 5 minutes

Sensor Cleanliness

Test: Lenses clear of dirt, spiderwebs, dust, condensation

Fix: Clean both sensor lenses with soft cloth, remove any obstructions

Easy - 2 minutes

Sunlight Interference

Test: Problem occurs only during certain times of day (morning/evening sun)

Fix: Shield sensors from direct sunlight (cardboard sunshade, reposition sensors)

Easy - 10 minutes

Path Obstruction

Test: Nothing in door path (toys, tools, debris, ice buildup)

Fix: Remove all objects from garage door path, clear tracks of ice/debris

Easy - 5 minutes

Sensor Wiring

Test: Wires connected firmly to sensors and opener, no visible damage

Fix: Reconnect loose wires, check for cuts/damage (may need professional repair)

Medium - 15 minutes

Bypass Test

Test: Hold wall button down continuously - door closes normally = sensor issue

Fix: Confirms sensor problem, focus on sensor alignment/cleaning/replacement

Easy - 1 minute

Frequently Asked Questions

Why does my garage door reverse when trying to close?

Most common cause (90%): misaligned photo-eye sensors. Sensors must point directly at each other - if alignment is off even slightly, door reverses for safety. Also check: dirty sensor lenses, sensor wiring loose/damaged, sunlight hitting sensors (causes false obstruction reading), obstruction in door path.

How do I know if my sensors are the problem?

Test: Hold down wall button continuously while closing. If door closes normally when holding button but reverses when using remote = sensor issue (holding wall button bypasses sensors). Also check sensor LED lights - should be solid green/red. Blinking lights = misalignment or obstruction detected.

What if cleaning and realigning sensors doesn't fix it?

Other causes: broken sensor (needs replacement $100-$200), damaged sensor wiring (repair $100-$175), limit switch needs adjustment (opener thinks door is closed when it's not), track obstruction (debris, ice buildup), door out of balance (springs need adjustment). Call for professional diagnosis if sensor fixes don't work.

Still Won't Close? We Can Help

If troubleshooting doesn't fix the problem, it may be broken sensor, damaged wiring, or track issue. Call for fast professional diagnosis and repair.

(405) 555-0365