Good to know
What goes wrong with openers
An opener is a motor, a drive, a logic board and a pair of safety sensors. When the door misbehaves, the fault is usually one of those, not the whole unit.
If the opener hums but the door will not move, the problem is often a broken spring or a stripped drive gear rather than the motor itself. Running it that way can finish off the motor, so it is worth checking the door balance at the same time.
A door that reverses before it closes is usually the safety sensors near the floor, dirty, blocked or misaligned, or the travel limits. Remotes, keypads and Wi-Fi boards are common culprits too, and most are a quick fix without replacing the opener.