Garage door won’t open? Here’s why.
A garage door that won’t open has a short list of usual suspects. Here’s how to tell which one you’re dealing with, in order from cheapest to most serious.
Start with the easy stuff
Before assuming the worst: is the wall button working but not the remote? That’s almost always a dead remote battery — a two-minute fix. Is nothing working at all? Check the opener is plugged in and the outlet has power (test it with a lamp).
Look for the manual lock. Many doors have a vacation lock or a handle that engages a deadbolt into the track. If someone turned it, the opener will strain and stop — disengage it and try again.
The photo-eye sensors
Two small sensors sit near the floor on each side of the door. If they’re misaligned, dirty, or blocked, the door won’t close (and sometimes won’t respond). Wipe the lenses, make sure both show a steady light (not blinking), and clear anything in the beam — a stray broom, a leaf, a cobweb.
In Florida, lovebugs and pollen coat these sensors twice a year. A quick wipe fixes more ‘broken’ doors than any other single thing.
When it’s the spring
If you hear a loud bang and then the door won’t lift — or it only rises a few inches and drops — you’ve likely broken a torsion spring. The opener isn’t strong enough to lift the door alone; the springs do that work. Stop using the opener (you’ll burn out the motor) and call for a spring replacement. This is not a DIY job — wound springs are dangerous.
A quick test if the door is partly open: pull the red emergency release and try to lift the door by hand. A balanced door floats; a door that crashes down or won’t budge has a spring problem.
Track and roller problems
If the door binds, jerks, or stops partway, look at the tracks for dents or a roller that’s jumped out. Bent track and off-track doors get worse every cycle — don’t force it. A tune-up realigns rollers and straightens minor track issues before they become a panel replacement.
Questions, answered.
01.Why won’t my garage door open but the light blinks?+
A blinking opener light usually means the safety sensors are misaligned or blocked. Clean both photo-eye lenses near the floor and make sure they face each other with steady (not blinking) lights.
02.My remote stopped working but the wall button works — why?+
That points to the remote, not the opener. Replace the remote’s battery first; if that fails, it likely needs reprogramming to the opener.
03.Can I open my garage door manually if the spring is broken?+
Carefully, and only to get a car out. A door with a broken spring is heavy and can drop fast. Pull the red release, lift evenly, and prop it — then call a pro before using it again.