Repair the Gate, or Replace the Opener?
Replacing the opener is where most people land first, because it is the part with a brand name on it and the part that looks like it stopped. It is also the most expensive item on the list, and often it is not what is wrong.
The check that settles it takes a minute. Every powered gate has a way to release the motor so the gate can be moved by hand. Released, the gate should travel its whole length under light, even effort. If it gets heavy, catches, or drifts back, the gate is the problem, and a new opener would spend its life fighting it.
When the fix is the gate, not the motor
An opener is sized to move a gate that swings or rolls freely. Give it one that binds and it does what it was built to do. It works harder, then stops and reports a problem rather than forcing through. From the driveway that looks identical to a broken opener.
Underneath, the cause is usually simple. A hinge post that has shifted, a gate that has dropped at the far end, a wheel riding on packed grit, or a guide knocked out of line by a delivery truck. Put the alignment back and the same opener runs the gate without complaint. It is the cheaper repair by a wide margin, and it holds, because nothing is being asked to overpower anything.
The gate itself, meaning hinges, posts, latches and sagging leaves on gates with no motor at all, is covered on gate repair.
When the opener really has reached the end
Sometimes it has, and you should be told that just as plainly. Gears wear out, and an opener that has spent years pushing a heavy gate wears out sooner. Older units reach a point where parts are no longer made. Where that is the case you hear it, and you hear why, rather than being handed a replacement because it is the easy sale.
When a new opener is the right call, it is worth doing once and doing it for the gate you actually own. Weight, width, swing or slide, how often it opens, and whether it has to keep working through a power outage all decide which unit belongs on your driveway. An opener a size too small is how this cycle starts over in a few years.