Garage Door Won't Open? 8 Common Causes & Fixes

1 Dead Remote Batteries

Symptoms: Remote doesn't work, but the wall button inside the garage opens the door normally.

This is by far the most common — and easiest — fix. Garage door remotes typically last 1-2 years on a single battery. When they start failing, they may work intermittently, only from very close range, or not at all.

The Fix: Open the remote (usually a small Phillips screw on the back) and replace with a fresh CR2032 or A23 battery, depending on your model. Most remotes work immediately. If the remote still doesn't work after a fresh battery, you may need to reprogram it.

2 Power Issues

Symptoms: Opener is completely silent. No lights, no humming, no clicking.

Sometimes the problem isn't your opener — it's the power supply. Check these in order:

• Outlet check: Plug in a lamp or phone charger to verify the outlet is working
• Circuit breaker: Garage door openers are often on shared circuits with other garage outlets. Check your electrical panel for tripped breakers
• GFCI outlet: If your opener is on a GFCI outlet (the kind with reset buttons), press the reset button
• Power cord: Make sure the opener's plug hasn't worked loose from vibration

The Fix: Restore power by resetting breakers/GFCI or moving to a different outlet. If your outlet itself is dead, you'll need an electrician — not a garage door repair company.

3 Broken Torsion Spring

Symptoms: Loud "BANG!" sound followed by the door becoming extremely heavy. Opener motor runs but door barely moves or doesn't move at all. Visible gap in the spring above the door.

This is the most serious cause and one of the most common. Garage door springs are under enormous tension and have a finite lifespan — typically 7-12 years depending on use. When they snap, the door becomes far too heavy for the opener to lift safely.

The Fix: Call a professional immediately. Learn more about our same-day spring replacement service. Most spring replacements are completed in under 60 minutes.

4 Disconnected Trolley (Emergency Release Pulled)

Symptoms: Opener motor runs smoothly but the door doesn't move. A red cord hangs down from the trolley on the ceiling rail.

Did someone accidentally pull the red emergency release cord? It's surprisingly easy to do — kids playing, someone reaching for something in the garage, or a recent power outage where you manually opened the door. The cord disconnects the door from the opener trolley so you can manually operate it.

The Fix: Easy one! Pull the red cord toward the door (not down, but at an angle pointing toward the door) to reconnect the trolley. You'll hear a click when it engages. Then press the wall button — the trolley should reconnect on the next operation.

If pulling toward the door doesn't work, manually close the door fully, then operate the opener normally. The trolley will automatically reconnect when it reaches the right position.

5 Misaligned or Blocked Photo Eye Sensors

Symptoms: Door starts to close but reverses immediately, or won't open at all. Opener lights flash repeatedly (often 10 times).

The photo eye sensors are small electronic devices near the floor on each side of the door. They send an invisible beam across the doorway. If the beam is broken — or the sensors are misaligned — the opener thinks something is in the way and won't operate.

The Fix:

• Clean the lenses: Wipe both sensor lenses with a clean, dry cloth. Spider webs, dust, and dirt are common culprits
• Check the indicator lights: Both sensors should have a solid (not flashing) LED light. One is usually green, the other amber/red
• Realign the sensors: Gently adjust each sensor until both lights are solid. They need to point directly at each other
• Check for obstructions: Move any boxes, tools, or items that may be blocking the beam

6 Snapped or Damaged Cables

Symptoms: Door hangs crookedly. Cable visibly hanging loose or pooled. Possible loud snap noise before the failure.

Garage door cables work together with the springs to lift and lower the door safely. They're under significant tension and can fail from age, rust, or being installed incorrectly. When a cable snaps, the door becomes unbalanced and unsafe to operate.

The Fix: Call a professional. Cable replacement requires releasing tension safely and properly winding new cables on the drums. Our cable repair service uses industrial-grade aircraft cable that lasts significantly longer than standard cables.

7 Damaged or Stripped Opener Gears

Symptoms: Opener motor hums or runs but the door doesn't move (or moves very slowly). Grinding noise from the opener housing.

Inside every garage door opener, a small plastic gear (called the "drive gear") translates the motor's rotation into the chain or belt movement that opens the door. Over years of use — typically 8-12 years — this gear wears down and eventually strips completely.

When the gear is stripped, the motor still runs (you can hear the humming) but there's nothing engaging the drive system. This is a very common issue with older openers.

The Fix: Stop using the opener immediately to prevent further damage. Gear replacement is a relatively quick repair (30-45 minutes) and far cheaper than a new opener. Our opener repair service handles this commonly. We stock replacement gears for all major brands in our trucks.

8 Wall Button or Lock Mode Issues

Symptoms: Wall button doesn't work but the remote does. Or you remember pressing a "Lock" button on the wall panel.

Most modern wall control panels include a "Lock" or "Vacation Mode" button that disables remote operation as a security feature. It's easy to bump accidentally, especially if it's near a wall switch you use often.

The Fix:

• Check the wall panel: Look for any indicator lights showing "lock" or "vacation" mode
• Press the lock button: If your panel has one, press it once to toggle off
• Check wiring: If the wall button doesn't work but the remote does, the wires may have come loose
• Restart the opener: Unplug the opener for 30 seconds, then plug back in. This resets some control issues