My garage door opener clicks but won't open. What's wrong?

When a garage door opener clicks but does not open, the click means the motor is getting power but cannot turn. The click is the opener trying and failing to start. The three usual causes are a failed capacitor, a stripped drive gear, or a door that is locked, frozen, or jammed. The fastest way to find which one is to disconnect the opener and lift the door by hand. If the door is heavy or stuck, the problem is the door. If it moves freely, the opener's capacitor or gear is at fault. Here is how to track it down.

First, separate the door from the opener

Before blaming the opener, find out whether the door is the problem. Pull the emergency release cord, the red handle on the opener rail, to disconnect the door from the motor. Then lift the door by hand. This one test splits the problem in half.

If the door will not move or feels very heavy, the problem is the door, not the opener. It may be locked, frozen to the floor, off its track, or held down by a broken spring. The opener was clicking because it tried to move a door it could not budge. In that case the fix is on the door side, and forcing the opener would only damage it.

If the door glides up easily by hand and stays where you put it, the door is fine and the fault is inside the opener. The motor has power, clicks, but cannot turn the drive. That points to an internal electrical or mechanical failure, covered below. Knowing which side of this line you are on saves a lot of guessing.

If the door is stuck: locks, ice, and springs

If the hand test showed a stuck door, work through these. First, check the locks. Many doors have a manual slide lock or handle lock that bolts the door to the track. An opener clicking against a locked door is common, so make sure no lock is thrown and the wall console's vacation lock is off.

In a Colorado winter, check whether the door is frozen to the floor. Melted snow under the bottom seal can refreeze overnight and glue the door to the concrete. The opener clicks and strains but the door will not break free. Do not force it. Chip the ice gently or pour warm, not boiling, water along the bottom seal to release it.

If the door is not locked or frozen but is still impossibly heavy, a spring has likely broken. Look at the torsion spring on the shaft above the door for a visible gap of an inch or two. The Consumer Product Safety Commission warns that springs store enough energy to cause serious injury, so a broken spring is a professional repair, not a DIY fix. Leave the door down and call for service.

If the opener is at fault: capacitor and gear

If the door moves freely by hand, the fault is inside the opener, and the click points strongly to the capacitor. The capacitor is a small cylinder that gives the motor the jolt it needs to start spinning. When it fails, the motor gets power and clicks or hums but cannot start. A bad capacitor is the most common cause of a clicking opener that will not move, and it is a part-level repair best left to a technician, since capacitors can hold a charge even when unplugged.

The other internal cause is a stripped drive gear. The main plastic gear can wear out so the motor turns or strains without driving the chain, belt, or screw. With a stripped gear you often see white plastic shavings near the motor, and the motor may run rather than just click. Either way, the link between the motor and the door is broken.

Hand test result	Likely cause
Door heavy, gap in spring	Broken spring
Door won't move, lock on	Manual or vacation lock
Door stuck at floor in winter	Frozen to the ground
Door moves freely, opener clicks	Bad capacitor (most likely) or stripped gear

Both the capacitor and the gear are inexpensive parts. On a newer opener they are worth fixing. On a unit over 12 to 15 years old, the repair cost plus the opener's age often favor replacement with a quieter modern unit that adds battery backup and smartphone control. A technician can give you both numbers, the repair price and a new-opener price, so you can decide rather than guess, and they can confirm whether weak springs are quietly straining the opener and causing the failure.

What the sound tells you

The exact sound the opener makes narrows the cause before you even open it up. A single sharp click with no motor noise usually means a relay on the logic board is firing but the motor never starts, which most often points to a failed capacitor or, less commonly, a board fault. The relay is doing its job; the motor is the part not responding.

A click followed by a hum or buzz is a classic capacitor symptom. The motor is energized and straining to start, but without the capacitor's jolt it cannot turn over, so it hums in place. If you hear that hum, do not hold the button, because the motor can overheat trying to start against itself.

A click and then a whirring or grinding while the door stays put usually means the motor is turning but nothing is driving the door, which points to a stripped gear or a disconnected trolley. Check whether the emergency release was pulled and the trolley is reconnected to the rail, then look for plastic shavings.

Total silence with no click at all is different. That points to a power problem: a tripped breaker, an unplugged unit, a dead outlet, or a failed board, rather than a stuck motor. Confirm the opener has power and the outlet works before assuming the motor failed. Matching the sound to these patterns tells you whether you are looking at a capacitor, a gear, the door, or simply lost power.

What to do next, safely

Start with the hand test, because it instantly narrows the problem. Then check the easy door causes you can handle yourself: unlock any slide or vacation lock, and free the door if it is frozen down. These resolve a good share of clicking-opener cases with no parts at all.

Do not keep pressing the button while the opener clicks. Repeatedly straining the motor against a stuck door or a failing part can burn out the motor or worsen a stripped gear, turning a small fix into a bigger one. If the opener clicks once or twice without the door moving, stop and diagnose rather than retry.

For the internal causes, a broken spring, bad capacitor, or stripped gear, call a technician. These involve stored energy or precise parts and are not safe or practical DIY jobs for most homeowners. A pro can test the capacitor, inspect the gear, check the springs, and fix the real cause in one visit. G Brothers offers same-day garage door and opener repair across the Denver metro, with free estimates.