A garage door that won't open is usually one of nine things. Work through this list before you call for garage door repair - you may fix it in two minutes.
Confirm the opener is plugged in and the breaker has not tripped. Then check whether the wall console is in vacation or lock mode - a blinking console light with a dead remote is the classic symptom.
The two small sensors near the floor must see each other. A leaf, a bike tire or a bumped bracket will stop the door closing and make the opener light flash. Wipe the lenses and re-align until the LEDs are steady - that is the fix behind a huge share of sensor repair calls.
Pull the emergency release and lift the door by hand. If it feels like 200-300 lb or slams back down, you have a broken spring. Look for a visible gap in the coil. Stop and book spring replacement.
If one side sits higher than the other or a cable hangs loose off the drum, that is cable repair, not an opener problem.
A motor that hums or grinds without moving the door usually means a stripped drive gear or disconnected trolley - see opener repair.
If the wall button works and the remote does not, it is a battery or pairing issue nine times out of ten.
Bends, dents and debris jam rollers. A door leaning inside the opening needs off-track repair.
If the door starts to close then reverses immediately, the down-limit or force setting may need adjustment.
Springs, cables and drums are under extreme tension. If the problem is in that group, call a pro. Emergency help is available 24/7 at (888) 247-0922.
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