Opener humming but the door will not budge, grinding when it runs, or dead on the wall button? Most opener faults are one worn part, and most openers are worth fixing rather than replacing.
This is the single most common opener fault we see, and it is almost always the same part. Chain and belt drive openers use a plastic drive gear that meshes with a worm gear on the motor shaft. Plastic is the deliberate weak point, there to strip before the motor burns out. When it goes, the motor still runs and still hums, but nothing is connected to the trolley any more.
A drive gear kit is an inexpensive part and a straightforward job. What matters is why it stripped. A gear that fails early is usually being asked to lift a door that is out of balance, so if the springs are tired the new gear will chew itself up as well. Any technician who fits a gear without checking the door's balance is selling you the same repair twice.
A large share of our winter opener calls turn out to be the opener doing its job correctly. Openers have a force setting: the amount of resistance they will push through before deciding something is in the way. In cold weather the grease in the tracks and the hinges stiffens, the door genuinely gets harder to move, and an opener set near its limit starts reading normal winter friction as an obstruction. The door reverses and the light flashes.
The fix is not always a bigger force setting. Turning the force up on a door that is genuinely binding removes the safety margin that stops the door closing on something. The right order is to service the door first, so it moves freely at fifteen degrees, and only then adjust the opener to suit.
The photo eye sensors near the floor are the other winter culprit. They are mounted six inches off a slab that gets snow, slush and salt on it all season, and they only need to drift a few degrees out of line to stop the door closing.
We replace an opener when the motor windings are gone, when the logic board has failed on a unit old enough that boards are no longer made, or when it predates 1993 and has no photo eye sensors at all. That last one is not negotiable: sensors became a federal safety requirement for a reason, and a door with no sensors will close on whatever is underneath it.
Otherwise a repair is usually the better value. A new opener is a several hundred dollar decision. A gear kit, a capacitor, a limit switch or a sensor realignment is not.
Almost certainly a stripped plastic drive gear. It is a cheap part and a routine job. Worth asking the technician to check the door's balance at the same time, because an out-of-balance door is what strips gears early.
Two usual causes, and both are common here. Either the photo eye sensors near the floor have drifted out of alignment, which happens easily on a slab that gets snow and salt all winter, or there is packed snow or an ice ridge on the threshold that the door is correctly treating as an obstruction. Clear the threshold first, then look at the sensors.
Usually yes, if parts are still available and the motor is sound. Openers from the mid 1990s onward are mechanically simple and most faults are one component. We will tell you honestly when a unit has reached the end rather than selling you a replacement you do not need.
Yes, and on Craftsman, Overhead Door and Wayne Dalton units too. There are brand pages on this site covering the specific faults each one tends to develop.
Related: LiftMaster Repair · Chamberlain Repair · Spring Repair
Opener repair across Grand Rapids and the surrounding communities.
