A garage door that won't close is frustrating and a security risk. Before you call for service, here are the most common causes. Some you can fix yourself.
Safety sensor misalignment: This is the #1 reason. Your door has two sensors at the bottom of the tracks. If they're bumped out of alignment, the door reverses or won't close. Check that both sensor lights are solid (not blinking). Clean the lenses and gently adjust until aligned.
Something blocking the sensor path: Even a spiderweb or leaf can trigger the safety sensors. Clear any debris from the sensor area.
Broken springs or cables: If you heard a loud bang and the door suddenly won't work, a spring likely broke. Do NOT try to operate the door. Call a professional immediately.
Track obstructions or damage: Inspect the metal tracks on both sides for dents, bends, or debris that could prevent the rollers from moving smoothly.
Opener limit settings: If the door starts to close but reverses before hitting the ground, the close-limit on your opener may need adjusting. Check your opener's manual.
Dead remote batteries: Sometimes it's the simplest fix. Replace the batteries in your remote and try again.
If sensors look fine and nothing is blocking the track, or if springs or cables appear broken, call us for same-day service.