Garage Door Won’t Open? 7 Common Causes and Easy Fixes

Your Garage Door Won’t Open — Now What?

You’re running late, you hit the remote, and… nothing. Your garage door won’t open. It’s one of those household problems that feels like a full-blown emergency — especially when your car is trapped inside.

The good news? Most garage door problems have simple explanations. Some you can fix yourself in minutes. Others need a professional, but at least you’ll know what you’re dealing with before you call.

Here at Sunny’s Home Service, we handle garage door repairs across Los Angeles every week. These are the 7 most common reasons we see — and exactly what to do about each one.

1. Dead Remote Batteries

We know — it sounds almost too obvious. But dead batteries in your garage door remote are the #1 reason people think their garage door is broken. Before you panic, swap in fresh batteries and try again.

Quick Fix

• Replace the batteries in your remote (most use CR2032 coin cells or AAA batteries)
• Try the wall-mounted button inside the garage — if that works, it’s definitely the remote
• If you have a second remote, test that one too

Cost to fix: $3–$8 for new batteries. Crisis averted.

2. The Door Is Locked or in Manual Mode

Many garage doors have a manual lock — a sliding bolt on the inside — that can get accidentally engaged. There’s also a manual release cord (usually a red handle hanging from the track) that disconnects the door from the opener.

Quick Fix

• Check the inside of the door for a manual lock and make sure it’s disengaged
• Look for the red emergency release cord — if it’s been pulled, the door won’t respond to the opener
• Re-engage the trolley by pulling the cord toward the door (or simply run the opener and it should reconnect automatically on some models)

Cost to fix: Free — just flip the lock or re-engage the cord.

3. Misaligned or Blocked Safety Sensors

Every modern garage door has two photo-eye sensors near the bottom of the tracks. If they’re misaligned, dirty, or blocked by something (a broom, a trash can, a kid’s bike), the door will refuse to close — and sometimes won’t open properly either.

Quick Fix

• Check both sensors for blinking lights (a steady glow means they’re aligned; blinking means something’s off)
• Wipe the lenses with a soft cloth — dust and cobwebs are common culprits in LA garages
• Make sure nothing is blocking the path between the two sensors
• Gently adjust the sensor brackets until both lights are solid

Cost to fix: Free for cleaning and adjusting. Sensor replacement runs $50–$100 if one is damaged.

4. Broken Torsion or Extension Springs

This is the big one. If you heard a loud bang from the garage — almost like a gunshot — a torsion spring probably snapped. Springs do the heavy lifting (literally), and when they break, the opener motor can’t raise the door on its own.

What to Do

• Do NOT try to open the door manually — a garage door without working springs is extremely heavy (150–300 lbs) and dangerous
• Look above the door for the torsion spring — if there’s a visible gap in the coil, it’s broken
• Call a professional. Spring replacement involves high-tension hardware and is not a safe DIY job

Cost to fix: $150–$350 for professional spring replacement in Los Angeles, depending on the spring type and door size. Sunny’s Home Service handles garage door spring repairs across LA — give us a call for a quote.

5. Stripped or Worn Gear in the Opener

If you hear the motor running but the door doesn’t move, the internal gear in your opener may be stripped. This is common in older chain-drive and belt-drive openers that have been working hard for 10+ years.

What to Do

• Listen carefully — if the motor hums or whirs but the chain/belt doesn’t move, a gear is likely the issue
• Gear kits are available for most major brands (Chamberlain, LiftMaster, Genie) and cost $15–$30 for the part
• Replacing the gear yourself requires disassembling the opener — it’s doable for handy homeowners, but most people prefer to have a pro handle it

Cost to fix: $100–$200 for professional repair, including parts.

6. Power Outage or Tripped Breaker

No power, no automatic opener. If there’s been a recent outage or the circuit breaker tripped, your opener is just sitting there powerless.

Quick Fix

• Check your electrical panel — look for a tripped breaker labeled “Garage” and flip it back on
• Make sure the opener is plugged in (they can get bumped loose, especially in older garages with shaky outlets)
• If you’re in the middle of an outage, use the manual release cord to open the door by hand

Cost to fix: Free. If the breaker keeps tripping, you may have a wiring issue — that’s worth calling an electrician about.

7. Track Damage or Obstructions

The metal tracks on either side of your garage door guide the rollers as the door opens and closes. If a track is bent, rusted, or has debris stuck in it, the door can get jammed partway.

What to Do

• Visually inspect both tracks for dents, bends, or gaps where the track pulls away from the wall
• Remove any visible debris (small rocks, leaves, tools that fell into the track)
• For minor bends, a rubber mallet can sometimes straighten things out — but be gentle
• Severely damaged tracks should be replaced by a professional to avoid the door falling off its track entirely

Cost to fix: $125–$250 for professional track repair or replacement in LA.

When to Call a Professional

Some of these fixes are true DIY — batteries, sensor cleaning, checking the breaker. But for anything involving springs, cables, tracks, or internal motor components, we strongly recommend calling a pro. Garage doors are one of the heaviest moving objects in your home, and the hardware is under serious tension.

Here’s a quick rule of thumb:

• DIY-safe: Batteries, sensor alignment, manual lock, power check, minor debris removal
• Call a pro: Broken springs, stripped gears, bent tracks, cable replacement, anything involving the torsion system

At Sunny’s Home Service, we’ve repaired hundreds of garage doors across Los Angeles — from older homes in Pasadena to newer builds in Culver City. We show up on time, diagnose the problem fast, and give you an honest quote before we start any work.

How to Prevent Garage Door Problems

A little maintenance goes a long way. Here’s what we recommend to keep your garage door running smoothly year-round:

• Lubricate moving parts every 6 months — springs, rollers, hinges, and the track. Use a silicone-based spray, not WD-40.
• Test the balance annually — disconnect the opener and lift the door halfway by hand. It should stay put. If it falls or rises, the springs need adjustment.
• Inspect the weatherstripping along the bottom of the door. LA’s sun and heat can dry it out fast.
• Tighten hardware — the vibration from daily use loosens bolts over time. A quick once-over with a socket wrench keeps things tight.
• Test the auto-reverse — place a roll of paper towels under the door and close it. The door should reverse immediately on contact.

Frequently Asked Questions

Need Help With Your Garage Door?

If your garage door won’t open and the quick fixes didn’t solve it, don’t force it — you could make the problem worse (or hurt yourself). Call Sunny’s Home Service at (213) 686-5039 for a free quote. We serve all of Los Angeles and show up on time, every time.