What to Do When Your Garage Door Won’t Open

Few things are more frustrating than pressing your garage door remote and nothing happens — especially when you are trying to leave for work, get home during bad weather, or secure your property at night. A garage door that won’t open can be caused by several mechanical, electrical, or automation-related issues, and knowing what to check can help you identify the problem quickly.

At Planet Automation, we specialise in garage door repairs in Cape Town, emergency garage door repairs, garage door motor repairs, and automated garage door servicing throughout Cape Town and surrounding areas.

If your garage door suddenly refuses to open, here are the most common causes and what you should do next.

1. Check if There is a Power Failure

One of the most common reasons an automated garage door stops working in South Africa is load shedding or a power outage.

If your garage door motor is completely unresponsive:

  • Check if your home has power
  • Confirm whether the circuit breaker has tripped
  • Inspect the wall plug or isolator switch
  • Check if the garage door motor display or lights are on

If your garage door system has a backup battery, the door should still operate during power outages. However, older or faulty batteries may no longer hold charge properly.

At Planet Automation, we regularly replace garage door motor backup batteries in Cape Town to help homeowners stay operational during load shedding.

2. Test the Garage Door Remote

Sometimes the issue is as simple as a flat remote battery or remote programming fault.

Try the following:

  • Replace the remote battery
  • Test a second remote if available
  • Move closer to the garage door
  • Check for flashing lights on the remote
  • Test the wall trigger switch

If the remote still does not work, the problem may involve the receiver, motor control board, or signal interference.

3. Check if the Door Has Been Locked Manually

Many garage doors have manual locking mechanisms that can accidentally engage. If the manual lock is activated, the motor may attempt to operate but the door will not move.

Inspect the door for:

  • Sliding manual locks
  • Engaged locking bars
  • Physical obstructions preventing movement

Forcing the garage door open while locked can damage the motor, cables, or tracks.

4. Inspect the Garage Door Springs and Cables

Broken springs or snapped cables are among the most serious reasons a garage door may stop opening.

Common warning signs include:

  • Loud snapping sounds
  • Door lifting unevenly
  • Door feeling extremely heavy
  • Loose hanging cables
  • Crooked door alignment

Garage door springs and cables operate under high tension and can be extremely dangerous if handled incorrectly.

Never attempt DIY spring or cable repairs. Contact a professional garage door repair company immediately if you suspect a spring or cable failure.

5. Look for Obstructions in the Tracks

Garage door tracks can sometimes become blocked by:

  • Dirt and debris
  • Bent tracks
  • Loose hardware
  • Damaged rollers
  • Objects obstructing movement

If the door starts moving but stops suddenly or jams halfway, the tracks or rollers may need professional inspection and adjustment.

Cape Town’s winter weather and coastal conditions can also contribute to rust buildup and track corrosion over time.

6. Check the Garage Door Safety Sensors

Modern automated garage doors use safety beams or obstruction sensors to prevent accidents.

If the sensors are misaligned, dirty, blocked or damaged the garage door may refuse to close or operate correctly.

Check for:

  • Flashing sensor lights
  • Dirt covering the lenses
  • Items blocking the beam
  • Loose sensor brackets

Cleaning and realigning the sensors can sometimes restore normal operation.

7. Disconnect the Motor and Test the Door Manually

Most garage door motors include a manual override release cord that allows the door to operate manually during emergencies.

Once disconnected:

  • Carefully lift the garage door manually
  • Check whether the door moves smoothly
  • Assess whether the door feels unusually heavy

If the door is difficult to lift manually, the issue likely involves:

  • Broken springs
  • Cable damage
  • Door imbalance
  • Track problems

If the door moves freely manually, the problem may be with the motor itself.

8. The Garage Door Motor May Be Faulty

Garage door motors can fail due to:

Electrical surges, Worn gears Faulty circuit boards, Water damage, Old age Poor maintenance, Battery failure

Common signs of motor failure include:

  • Humming noises without movement
  • Flashing error lights
  • Intermittent operation
  • Clicking sounds
  • Complete loss of power

At Planet Automation, we repair and install leading garage door motor brands including Centurion garage door motors and smart garage automation systems across Cape Town.

9. Avoid Forcing the Garage Door Open

One of the biggest mistakes homeowners make is forcing the garage door open when something is wrong.

This can cause:

  • Motor burnout
  • Track damage
  • Cable snapping
  • Roller failure
  • Structural damage to the door

If the garage door is jammed or uneven, stop operating it immediately and arrange professional repairs.

10. Call a Professional Garage Door Repair Company

Some garage door problems require urgent professional attention to avoid safety risks and further damage.

Professional garage door technicians can:

  • Diagnose the fault correctly
  • Replace damaged cables and springs
  • Repair garage door motors
  • Rebalance the door safely
  • Restore smooth operation
  • Prevent future breakdowns

Attempting DIY repairs on high-tension systems can be extremely dangerous without the correct tools and experience.

We service sectional garage doors, roll-up garage doors, and automated garage systems throughout Cape Town, the Northern Suburbs, Southern Suburbs, Atlantic Seaboard, and surrounding areas.

Our experienced technicians understand the common garage door problems caused by Cape Town’s weather conditions, daily wear, and ongoing load shedding challenges.

The best way to avoid unexpected garage door failures is through routine preventative maintenance.

Regular garage door servicing helps:

  • Identify wear before failure occurs
  • Improve safety
  • Extend motor lifespan
  • Prevent costly repairs
  • Keep your garage door operating smoothly year-round

Annual garage door servicing is especially important in Cape Town due to coastal corrosion, moisture exposure, and heavy daily use.