just installed my nexx garage opener but the door won't move, the unit just clicks loudly when i press the button.

Diagnosis

The loud clicking sound you hear is the internal dry-contact relay of the NXG-200 engaging and disengaging. This confirms that the WiFi controller is receiving power and the app command is successfully reaching the device. However, the "click" without movement indicates a break in the electrical circuit between the NXG-200 relay and the garage door motor's push-button terminal. Essentially, the switch is flipping, but the signal isn't reaching the motor to trigger the door. This failure typically stems from one of three issues: poor contact at the motor's terminal strip, a mismatch in the wiring of the two trigger wires, or a safety override triggered by the door's infrared sensors. If the motor unit detects a blockage or a misalignment in the safety sensors, it will ignore the "close" command from the NXG-200, even though the relay is clicking. You can confirm this by attempting to operate the door using the original physical wall button; if the physical button also fails to close the door, the issue is with the motor or sensors, not the NXG-200.

How to Fix It

To resolve the connectivity gap and get the door moving, follow these precise steps:

1. Locate the two thin trigger wires coming from the NXG-200. Ensure they are stripped back approximately 1/4 inch (6mm) to expose clean copper wire.
2. Identify the push-button terminals on the back of your garage door motor (usually labeled "Wall Button" or "Push Button"). These are typically two small screw terminals or spring-loaded clips.
3. Loosen the terminal screws completely. Insert one NXG-200 wire into each terminal. Ensure the copper is making direct contact with the metal terminal, not just the plastic insulation of the wire.
4. Tighten the screws firmly. Give each wire a gentle "tug test" to ensure they are mechanically secure and won't vibrate loose during operation.
5. Check the safety sensors at the base of the garage door tracks. Look for the LED indicator on both the sending and receiving sensors. Both must be solid green or amber. If either is flickering or off, adjust the sensor bracket until the light remains solid.
6. Perform a "Hard Reset" of the motor by unplugging it from the AC outlet for 30 seconds and plugging it back in to clear any temporary logic errors.

If That Didn't Work

• Check for "Lock-Out" Mode: Many modern garage motors (like Chamberlain or LiftMaster) have a "Lock" or "Vacation" button on the main motor chassis. If this was accidentally pressed during installation, the motor will ignore all external trigger signals, including the NXG-200, while still allowing the internal manual release to work. Toggle this switch to the "Unlock" position.
• Verify Voltage Compatibility: While the NXG-200 uses a dry-contact relay, some high-end "Smart" motors use encrypted signals rather than simple closures. If your motor has a yellow "Learn" button and requires a specific remote code, the NXG-200 cannot be wired directly to the terminals. In this case, you must wire the NXG-200 to the terminals of a spare remote control's button, effectively "mimicking" a remote press.
• Test with a Jumper Wire: To isolate the NXG-200, take a small piece of insulated copper wire and briefly touch (short) the two push-button terminals on the motor. If the door moves, the motor is fine and the issue lies in the NXG-200 wiring or a faulty relay. If the door does not move, the problem is within the motor's circuitry or the safety sensors.
• Inspect the Door Balance: If the motor hums for a second then stops (accompanied by the click), the door may be too heavy or the tracks may be bound. Disengage the emergency release cord and move the door manually to ensure it glides smoothly without sticking.

Heads Up

• Wire Gauge Warning: Use 22AWG or 24AWG stranded wire for the connection to the motor. Using wire that is too thick can prevent the terminal screws from clamping down fully, leading to intermittent operation.
• Avoid Wire Overlap: Ensure the two trigger wires are not touching each other at any point outside the terminals. A short circuit will prevent the relay from triggering the motor and could potentially damage the NXG-200 internal board.
• Sensor Maintenance: Clean the lenses of your safety sensors with a damp microfiber cloth every six months. Dust and spider webs are the primary causes of "phantom" blockages that stop the NXG-200 from closing the door.
• Power Cycle: If the app shows the door as "Open" when it is "Closed," re-calibrate the magnetic reed sensor on the door frame to ensure the NXG-200 accurately tracks the door's position.