Most garage door problems trace to one of seven common causes: broken spring, failed cable, misaligned sensors, dead opener battery backup, worn rollers, bent track, or damaged remote. This guide walks through symptoms and points you to the likely cause — plus tells you when DIY is safe vs. when to call a tech.
If your door won't close at all
Most common cause: misaligned photo-eye safety sensors. Look for one sensor with a steady amber/red LED and one with a blinking LED. They need to face each other directly. Realignment is a 5-minute DIY fix — gently rotate one sensor until both LEDs go solid. If both LEDs are dead, the sensors themselves have failed and need replacement ($89-$145).
Second most common: dead battery backup (FL Code required since 2019). If your opener beeps every few seconds, the backup battery is at end-of-life. Replacement: $145.
If your door won't open at all
Most common cause: broken torsion spring. Walk into the garage and look at the spring above the door. Any gap of more than 1/4 inch in the coil means it's broken. Don't try to lift the door manually — without spring tension, a steel sectional door weighs 150-300 lbs. Call a tech.
Second most common: snapped lift cable. The door may sit crooked, with one side dropped lower than the other. Same warning — don't try to lift, the remaining cable is under high tension.
If your door reverses while closing
Photo-eye safety sensors detecting an obstruction in the path. Common causes: lawn equipment temporarily blocking the beam, spider webs or dust on the lens, sensor misalignment from a bump, or sensor failure.
Quick fix: wipe both sensor lenses clean with a soft cloth. Check that nothing is in the path. Realign by hand if needed. If the issue persists, the sensors may have failed — replacement $89-$145.
If your door makes grinding or rattling noise
Most common cause: worn rollers. Cheap builder-grade nylon rollers fail at the 10-year mark in Florida humidity. Sealed-bearing nylon replacements ($185-$245 for a full 10-roller set) eliminate the noise and extend door life 8+ years.
Second common cause: spring needs lubrication. If it's a high-pitched squeak rather than a grind, lubricate the spring, hinges, and rollers with a silicone-based garage door lubricant. Reapply every 6 months.
If your remote isn't working
Try this sequence: (1) Replace the remote battery — they last 2-3 years. (2) Re-pair the remote to the opener (most LiftMaster openers: press the 'Learn' button, then press the remote button within 30 seconds). (3) If the wall keypad works but the remote doesn't, the receiver may be fine and you just need a new remote ($45). (4) If neither remote nor keypad work, the receiver module on the opener has failed ($85 to replace).
If your opener clicks but the door doesn't move
Most common cause: stripped gear inside the opener. Plastic main gear wears out after 12-18 years on chain-drive openers. Gear-kit replacement: $145-$225, or full opener replacement is often more cost-effective on units 18+ years old.
Second common cause: logic board damage from a voltage spike (thunderstorm). The opener may behave intermittently. Logic board replacement: $185-$295.
If your door is off-track
Don't try to push it back. Off-track doors can drop or twist further. Common causes: failed roller, snapped cable, or impact damage (car, lawn tractor). Re-tracking plus damaged-part replacement runs $245-$385. Call a tech and don't drive the car under the door until it's fixed.
If your door closes but won't stay sealed
Most common: worn weather seal on the bottom panel. Replace the bottom seal ($95-$165 installed). Second cause: limit switch on the opener needs adjustment so the door travels far enough down. We adjust during any service call.
Common questions.
Can I troubleshoot my garage door myself?
Sensor cleaning, remote battery replacement, lubrication, and re-pairing remotes are all safe DIY tasks. Anything involving springs, cables, or tracks under tension is dangerous and should be done by a professional. Garage door springs are the #1 source of DIY garage repair injuries.
What's the most common garage door problem?
Broken springs are the #1 service call. Photo-eye sensor misalignment is the #1 'won't close' complaint and is usually free to fix on-site. Worn rollers are the #1 noise complaint.
How do I know if my spring is broken?
Walk into the garage and look at the spring above the door. A broken torsion spring has a visible gap in the coil. Also: the door will feel impossibly heavy if you try to lift it manually.
Is it dangerous to operate a garage door with a broken spring?
Yes. Without spring tension, the door is held only by the opener — which isn't designed for that load. The opener can be damaged, the cables can snap, and the door can drop unexpectedly. Stop using the door and call us.
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