When a garage door will not open, check in this order: remote batteries and lock button, power to the opener, the disconnected release cord, photo-eye sensors, and only then springs and cables, because the last two are the ones you should not touch yourself.
By Ryan Gold, lead technician, Reliable Garage Doors · Updated on July 19, 2026
Swap the remote battery, then try the wall button. If the wall button works and the remote does not, the problem was a coin cell. On most openers a lock or vacation button on the wall console disables remotes entirely; a lit padlock icon means someone leaned on it. Then check power: openers die when a GFCI outlet trips, and garage GFCIs trip often.
Next, look up at the trolley. If someone pulled the red release cord, the trolley is disconnected and the motor runs without moving the door. Re-engage by running the opener until the trolley clicks back in, or per your manual.
Photo-eye sensors near the floor block closing, but a misaligned or unplugged pair can also cause strange no-run behavior on some units. Each eye should show a steady light; a blinking or dark eye means misalignment, a cut wire or sun glare. Wipe the lenses, square them toward each other until both lights hold steady, and try again.
Pull the release cord with the door CLOSED and lift by hand. A healthy door lifts smoothly with one hand and stays put at waist height. A door that feels like dead weight has a broken or dead spring; a door that lifts crooked has a cable or track problem. Both put full door weight where your hands are, and both are jobs for winding bars and containment, not a Saturday experiment.
The tell for a snapped spring is a single gunshot bang from the garage, often heard hours earlier. Look above the door: a two-inch gap in the coil confirms it. Our spring work is covered on the spring replacement page.
Want a number, not a sales pitch? Call 757-208-1600 and we quote it on the phone where we can.
The motor is running against something that no longer transfers motion: a stripped drive gear, a broken trolley, or a door seized by a snapped spring. Stop pressing the button; repeated attempts strip parts further and can burn the motor.
Cold stiffens grease, contracts steel and kills marginal batteries. If the door drags on the coldest mornings, the spring is usually undersized or worn, and lubrication plus a balance check fixes most of it.
Weak remote batteries or interference, most commonly from LED bulbs installed inside the opener. Swapping to opener-rated bulbs restores range surprisingly often.
Only if you have a keyed emergency release kit installed. From inside, the red cord releases the trolley with the door closed. If you are locked out entirely with no release kit, that is a service call, not a crowbar moment.
