Garage Door Won’t Open or Close?
Some garage door problems are a two-minute fix. Others involve a spring under enough tension to injure you. Here is how to tell the difference.
Stop and Call a Pro If You See This
Treat it as urgent if you see:
- A visibly broken or separated spring above the door
- A door hanging crooked, jammed, or partially off its track
- A snapped or frayed lift cable
- A door that slams down instead of lowering smoothly
- Any attempt to lift a heavy door by hand with a broken spring
A broken spring, frayed cable, or off-track door turns a heavy panel into a falling hazard. Do not try to force, lift, or manually operate a door in that condition — park outside and call a garage door technician.
Quick answer
Rule out the cheap causes first: power at the outlet, remote and keypad batteries, clean and aligned safety sensors, and an emergency release cord that has not been pulled. If you heard a bang, the door hangs crooked, or you can see a gap in the spring above the door, stop there — spring and cable work is a professional repair. This page is educational information, not a diagnosis of your door.
Possible causes
Broken torsion or extension spring
A loud bang followed by a door that will not lift is almost always a broken spring. This is not a DIY repair.
Misaligned safety sensors
If the door closes then reverses, the photo eyes near the floor are usually blocked or knocked out of alignment.
Opener gear or belt failure
A motor that hums without moving the door often has a stripped plastic drive gear.
Off-track or bent rollers
A door hit by a vehicle, or with worn rollers, can jump the track and bind.
Remote, keypad, or power issues
Dead remote batteries, an unplugged opener, or a tripped GFCI look like total failure.
Frayed or snapped lift cable
A door that hangs crooked usually has a failed cable on one side.
Manual release engaged
A pulled emergency release disconnects the door from the opener carriage.
What you can safely check yourself
- Confirm the opener is plugged in and the outlet or GFCI has power.
- Replace the remote and keypad batteries.
- Wipe the safety sensors and check that both indicator lights are steady, not blinking.
- Look at the springs above the door from a distance — a visible gap means a break.
- Check that the emergency release cord has not been pulled.
Before the pro arrives
- • Note the door size, whether it is insulated, and the opener brand.
- • Describe the exact sound and behavior when you press the button.
- • Photograph the springs, cables, and any damage from a safe distance.
- • Ask whether springs should be replaced in pairs.
Questions to ask
- • Are you replacing both springs, and what cycle rating are they?
- • Is the opener worth repairing at its age, or is replacement smarter?
- • Does the quote include rollers, cables, and a safety tune-up?
- • What warranty comes with the parts and the labor?
- • Will you test and reset the force and safety reversal settings?
Common questions
Can I replace a garage door spring myself?
No. Torsion and extension springs store enough energy to cause severe injury. Spring replacement is one of the few home repairs that is genuinely dangerous without the right winding bars and training.
Why does my garage door reverse before it closes?
Almost always the safety photo eyes near the floor: blocked, dirty, or knocked out of alignment. Both indicator lights should be steady, not blinking.
The opener hums but the door does not move. What is wrong?
Usually a stripped drive gear inside the opener or a broken spring leaving the door too heavy to lift. Check the springs from a distance before assuming it is the opener.
Should both springs be replaced at once?
Yes, on a two-spring door. They wear at the same rate, so replacing one usually means paying for a second service call within a year.
Keep reading
Other common home problems
Start with the symptom and get likely causes, safety guidance, and a next step.
Fixly Guide provides educational guidance only. Nothing here is a professional diagnosis, an inspection, or a guarantee of contractor availability or pricing.