Install a Garage Door Opener

Start by assembling the head tube or rail sections. Some snap together while others require fasteners. This is a general how-to for installing a garage door opener. Note: Remember to always follow your particular model’s instructions closely, since there are different types of garage openers available.

Make sure the trolley is installed on one of the sections and that the stop bolts and tabs are in place. Then secure the other end to the power unit.

Safety Alerts!

You'll need a GFCI-protected receptacle in the ceiling adjacent to the power unit. If you're comfortable with basic wiring, you can extend power from an existing unswitched outlet or junction box. If not, hire a licensed electrician.

Before doing any type of electrical work, turn off power for the circuit you’re using to avoid the risk of electric shock.

Tighten the chain until approximately ¼” of the chain is above the base of the rail. For belt drives, hand tighten the spring nut and once released it will apply the correct amount of tension to the belt.

Locate the center point of the garage door, and mount the header bracket at that point, at the manufacturer-specified distance above the door. With the power unit on the floor, raise the attached rail/rod and attach it to the header bracket with a clevis pin and split ring. Raise the power unit high enough to clear the door when it is open and set it on a ladder or another structure to prop it up.

Helpful Tip

Use packing materials under the power head to avoid scratching it on the floor.

Once the rail is attached to the header bracket, open the door and use a 2X4 laid flat on the top section of the door and under the rail. This puts the rail at the proper downward slope and holds the power head at the correct height to be mounted to the ceiling. You won’t have to hold up the power head and fasten it at the same time.

Attach the supplied mounting straps to the power unit. If your garage has an open ceiling, attach the mounting straps/bracket to joists. With a closed ceiling, attach a 2x4 mounting board across the ceiling by screwing it into joists above the ceiling with an electric screwdriver or drill. Then attach the mounting straps to it. Check to make sure that the rail is at the proper downward slope, per the manufacturer’s specifications, and adjust straps if required. Lower the door back to the down position.

Attach the door bracket to the door and the L bar to it. Attach the straight bar to the trolley with a clevis pin and split ring. Then pull the emergency release on the trolley and slide the trolley to the door. Next, attach the straight bar to the L bar with the fasteners provided with your garage door opener kit. Re-engage the trolley.

Attach the wall control at a convenient location near an entry door at least 5’ off the floor and out of reach of young children. Run the low-voltage wires up the wall and across the ceiling using insulated staples. Be careful not to damage the wire insulation. Connect the wire to the power unit.

Install the safety sensors, one on each side of the door, at the same height and no more than 6” above the floor. Run the wires — stapled next to trim or wherever they are best protected — to the power unit into which they plug. Following the manufacturer’s instructions, set the travel limits or how far the door opens and closes. Test the safety systems by first placing a 2x4 flat on the floor under the door. Operate the door in the down direction. The door should reverse off of the 2x4. If not, follow the manufacturer’s instructions and set the force until it works properly. Open the door again. Place the empty carton on the floor under the door and in the path of the safety sensor beam. Operate the door. It should start to move but quickly stop and reverse. If not, adjust the sensors.

Helpful Tip

Mount the receiving sensor on the side least likely to have direct sunlight on it.

The remote control is set up from the factory so only it can activate the opener. With today’s more sophisticated units, adding an additional remote is done using the programing or smart button on the back of the power head. For security, a different code is randomly activated every time you use the remote.

No door opener installation is complete without final adjustments to the open/close force controls and obstruction sensors, so be sure to test the door's operation according to installation instructions.

Voilà! Your garage door will now open and close with the mere touch of a button.