“My Garage Door Won't Open”: The Ranked Diagnostic
Why Won't the Garage Door Open?
Work this list top to bottom. It is ordered so the free, thirty-second checks come before anything mechanical.
- 1 No power or an engaged lock feature: the opener is unplugged, a breaker or GFCI outlet tripped, or the wall console's lock/vacation switch is on, which ignores remotes on purpose.
- 2 Dead transmitter batteries: the remote or keypad battery has faded. Test from the hardwired wall button: if the wall button works but remotes do not, it is batteries or pairing.
- 3 A disengaged manual release, someone pulled the red cord (often during a past outage), so the trolley is disconnected and the motor runs without moving the door.
- 4 A broken torsion spring: the door's counterbalance is gone. Telltales: a past loud bang, a visible gap in the spring coil, the opener straining, or the door lifting a few inches and stopping. Safety-critical: stop here and call.
- 5 A stripped opener drive gear: the motor hums and the light comes on, but the trolley never moves. Common on older openers; the nylon drive gear inside wears out.
- 6 A frozen or obstructed bottom seal, in freezing weather the seal can bond to the slab, and the opener gives up rather than tear it.
Which Checks Can You Safely Do Yourself?
Everything electrical and everything at the level of buttons and batteries is yours. Go in order:
- Confirm power: the opener's light should respond to the wall button. Check the plug, the breaker, and any GFCI outlet on the garage circuit.
- Check the wall console's lock switch and try the door from the wall button. If the wall button moves the door, replace remote and keypad batteries and re-pair.
- Look at the trolley on the opener rail: if the red cord hangs and the trolley slides freely, re-engage it, with the door fully closed, pull the cord toward the door (per your model's manual) and run the opener until the trolley clicks back in. Our manual-open guide covers the full procedure in both directions.
- Look, do not touch, at the spring above the door: a two-inch gap in the coil means it has broken. Leave the door closed and skip straight to calling.
- In freezing weather, check whether the bottom seal is iced to the slab, and free it gently by hand, never by forcing the opener.
- If the motor hums without movement and the trolley is engaged, suspect the drive gear and note it for the technician. That one is an opener-internals repair.
- One clarification that saves confusion: the photoelectric safety sensors block closing, not opening. If your door opens fine but refuses to close, that is the sensor symptom: our five-minute sensor realignment guide covers it.
When Should You Call a Professional?
Call immediately for anything spring-related: a broken spring means the opener is being asked to lift the door's full weight, several hundred pounds, which it cannot safely do, and manually lifting a spring-broken door is a two-technician job, not a homeowner task. The same goes for a door that lifts crooked or shows a slack cable; those are load-path failures wearing a won't-open disguise.
A stripped drive gear, a dead logic board, or a wall-button circuit fault are also professional repairs, quick ones. If the car is trapped before work or the door will not secure the house, that is exactly the situation same-day emergency service exists for, and every Good Golly location handles won't-open calls daily. If the fix turns into a bigger decision, an aging opener or a door with repeated failures, our repair-versus-replace guide walks the call, with a free second opinion on any major residential estimate.
Door Won't Open FAQs
Common homeowner questions
Straight answers first: your local team can go deeper on anything specific to your door and your home.
Why won't my garage door open but the opener light comes on?
Power is fine, so the fault is between the motor and the door: a disengaged manual release (the trolley slides freely on the rail), a stripped drive gear (the motor hums but the trolley never moves), or a broken spring the opener cannot lift against. Check the release cord first. It is the free fix.
Why does my garage door only open a few inches and stop?
That pattern strongly suggests a broken torsion spring: the opener starts the lift, meets the door's full uncounterbalanced weight, and its safety logic gives up. Look for a gap in the spring coil above the door, leave the door closed, and schedule professional spring replacement.
How do I open my garage door when the power is out?
With the door fully closed, pull the red manual release cord to disconnect the trolley, then lift the door smoothly by hand and lower it fully after use, never leave it partway. Our step-by-step manual-open guide covers the safe procedure, including the one case where you should not attempt it: a broken spring.
Why won't my garage door open with the remote but the wall button works?
The door and opener are healthy: the problem is the transmitter. Replace the remote's battery first, then re-pair it with the opener's learn button. If it stays unreliable, the remote's button contacts are worn, or the wall console's lock feature is intercepting remotes by design. Check the lock switch.
From reading to fixing
Choose the Good Golly team nearest the home.
Every Good Golly location works from the same honest playbook you just read, including a free second opinion on any major residential repair estimate. Your local team confirms the details for your door, your climate, and your schedule.