The Short Answer
A click means the command reached the operator and the relay or contactor pulled in correctly. Everything upstream of the motor is working. The motor itself is what is not starting. On most residential gate operators that comes down to three things: a failed start capacitor, which is the single most common cause and a very specific failure; a motor that has seized or is mechanically locked by a bind in the gate; or a backup battery browning out under the inrush current, which clicks as the voltage collapses and recovers. The click is genuinely useful diagnostic information, because it eliminates power supply, remotes, keypads, receivers, and the board as suspects in one observation.
Most Likely Causes, In Order
01
Failed start capacitor
The most common answer by a wide margin, and a textbook failure mode. Single-phase motors need a capacitor to generate the phase shift that gets them turning; once running they sustain themselves. When the capacitor fails, the relay still clicks, the motor still energizes, but it cannot begin to rotate. Capacitors fail from heat and age, and Houston summers are hard on them. The classic symptom set is a click, a hum, and no movement.
02
The motor is mechanically locked
If the gate is jammed, a hinge has seized, a slide gate is off its track, or the gearbox has failed internally, the motor cannot turn no matter how healthy it is. The relay clicks, current flows into a locked rotor, and the thermal protection trips. This is why checking whether the gate moves freely by hand is the first thing to do — it separates a dead motor from a jammed gate in under a minute.
03
Battery browning out under inrush current
Starting a motor demands far more current than running it. A weak battery can hold normal voltage at rest and then collapse the instant the motor tries to start, which drops out the relay, which lets the voltage recover, which pulls the relay back in. The audible result is repeated clicking or chattering. Common on solar systems and on any operator with an aging backup battery, and Houston heat shortens battery life considerably.
04
Failed motor windings
Motors do die, usually after a period of running hot or working against resistance. A motor with open or shorted windings will energize with a click and never turn. Often there is a burnt smell, discoloration at the housing, or a history of the gate running slow and hot before it finally quit — the slow phase is the warning most people do not act on.
05
Failed relay or contactor
Slightly counterintuitive, since the click comes from the relay, but a contactor whose contacts have pitted and burned will pull in audibly while failing to pass full current to the motor. The click sounds normal and nothing happens. Common on high-cycle commercial gates where the contactor has switched hundreds of thousands of times.
06
Low or sagging supply voltage
A long undersized wire run, a corroded buried splice, or a failing transformer delivers less voltage than the motor needs to start, even though it is enough to operate the board and the relay. The symptom is identical to a failed capacitor, which is why measuring voltage under load is part of a real diagnosis rather than just replacing parts.
What You Can Safely Check Yourself
There is exactly one thing worth doing yourself here, and it is the most informative test available. Everything else on this problem is inside the housing.
- ✓Use the manual release to disconnect the operator from the gate
- ✓Move the gate by hand through its full travel — it should move freely with light effort
- ✓If the gate is hard to move or jammed, the motor is probably fine and the gate is the problem
- ✓If the gate moves freely by hand, the fault is in the operator and needs a technician
- ✓Note whether you hear one click or repeated clicking, which separates a capacitor from a battery
- ✓Note any burning smell or heat at the housing, and stop cycling it if either is present
Capacitors Hold a Lethal Charge
This is the one gate problem where we are emphatic about not opening the housing. A start capacitor stores enough energy to seriously injure or kill, and it holds that charge after the power is disconnected — cutting the breaker does not make it safe. Capacitors have to be discharged properly before anything near them is touched. Every online video that shows someone swapping a capacitor bare-handed is showing you someone who got lucky. On top of that, a motor that clicks is energizing, which means the gate can lurch into motion without warning while you are reaching into the mechanism. Use the manual release, test the gate by hand, and stop there.
When to Stop and Call Someone
Call as soon as you have done the by-hand test, and stop cycling the gate in the meantime — repeated attempts drive current into a motor that cannot turn, which is how a capacitor failure becomes a burned-out motor. Call immediately if there is a burning smell or the housing is hot. Our $89 diagnostic tests the capacitor, measures voltage under load, checks the relay or contactor, verifies motor continuity, and confirms whether the gate is mechanically free, so you learn which part actually failed instead of paying for a guess. It is applied toward the repair.
Questions People Ask
Why does my gate click but not open?
The click is the relay or contactor doing its job, which means the command arrived, the board responded, and power is reaching the motor circuit. The motor is the part failing to start. On most residential operators the cause is a failed start capacitor, a motor locked by a mechanical bind in the gate, or a weak battery collapsing under the current needed to start. The click actually rules out the remote, keypad, receiver, board, and power supply all at once.
What is a start capacitor and why do they fail?
It is a component that gives a single-phase motor the initial phase shift it needs to begin turning. Once the motor is spinning it keeps itself going, so the capacitor only matters at startup — which is exactly why a failed one produces a click and a hum with no movement. They fail from heat and age, and the inside of a gate operator housing in a Houston summer is a hard environment for them. It is one of the more common gate repairs we do.
Can I replace the capacitor myself?
We strongly advise against it. A start capacitor stores enough energy to kill, and it holds that charge after the power is off, so turning off the breaker does not make it safe to touch. It has to be discharged properly first. Beyond the electrical risk, the motor is live when it clicks, so the gate can move suddenly while your hands are in the mechanism. This is a genuinely dangerous repair to attempt, not a liability disclaimer.
My gate clicks repeatedly instead of once. Does that mean something different?
Yes, and it is a useful distinction. A single click usually means the relay pulled in and the motor failed to start, which points at the capacitor or the motor. Repeated clicking or chattering usually means the voltage is collapsing and recovering, which points at a weak battery or a bad connection — the relay drops out when voltage falls, then pulls back in when it recovers, over and over. Mention which one you hear when you call.
How do I tell whether it is the motor or the gate?
Use the manual release to disconnect the operator and move the gate by hand. A healthy gate swings or slides freely with light effort. If it is heavy, catching, or jammed, the motor is likely fine and the problem is mechanical — a seized hinge or roller, a slide gate off its track, or a failed gearbox. If the gate moves easily by hand and the operator still only clicks, the fault is inside the operator.
Will this damage my gate opener if I keep trying?
Yes, and quickly. Every attempt pushes heavy current into a motor that cannot turn, and a locked rotor heats up fast. That is how a capacitor replacement turns into a motor replacement. If your gate clicks and does not move, stop pressing the button, use the manual release if you need the gate open, and get it looked at.