How to Fix a Garage Door

A garage door consists of two key elements: the door itself and the opener. In this guide, we will walk you through repairing both of these components, starting with the door itself.

Fixing a Garage Door

Overhead garage doors, whether they roll up in sections or swing upward in one solid piece, operate using spring tension. The door moves along metal tracks attached to the garage walls, with powerful springs supplying the necessary force. In most instances, when the door isn't functioning smoothly, the fixes are relatively simple. Here are some useful repair suggestions:

Step 1: Inspect the metal tracks inside the garage. Check the mounting brackets securing the tracks to the walls. If they're loose, tighten the bolts or screws holding them. While inside the garage with the door closed, look for dents, crimps, or flat spots along the tracks. If you find any damage, tap them out gently using a rubber mallet or a hammer and scrap wood. For severely damaged tracks, consider replacing them.

Step 2: Use a level to check that the tracks are properly aligned. Horizontal tracks should slope slightly downward toward the back of the garage. For roll-up doors, ensure the vertical sections are perfectly plumb. Both tracks should be at the same height on the walls. If alignment is off, loosen (but don't remove) the screws or bolts holding the mounting brackets, then tap the tracks gently into position. After adjusting, recheck with the level and tighten the screws or bolts.

Step 3: Clean the tracks using a concentrated household cleaner to remove accumulated dirt and hardened grease. Thoroughly clean the rollers and dry both the tracks and rollers.

Step 5: Inspect all hardware and tighten any loose parts. For swing-up doors, check the plates where the spring is mounted to ensure the screws are secure. For roll-up doors, examine the hinges holding the sections together, tighten loose screws, and replace damaged hinges. If one side of the door sags, the hinges may need servicing. If a screw hole is enlarged, replace the screw with a longer one of the same size and use a hollow fiber plug, dipped in carpenter's glue, with the new screw. For cracked wood at a hinge, remove the hinge, fill the cracks and holes with wood filler, allow it to dry, and replace the hinge. If possible, relocate the hinge to a more solid area of the wood.

Caution: If your roll-up door features a single torsion spring at its center, avoid attempting any repairs yourself. The spring's tension is so intense that it could potentially cause injury. For this type of spring, it is advisable to contact a professional repair service.

Sometimes, the issue with your garage door might be related to the opener. In the next section, we will guide you through the process of replacing a garage door opener.

How to Replace a Garage Door Opener

A garage door opener is one of the most useful devices you can add to your home. You can easily install it yourself by following these general steps along with the specific instructions that come with the opener unit.

The typical garage door opener features a reversible motor that moves a carriage along a rail positioned above the door. A drawbar is attached to the carriage to raise and lower the door, with devices that limit travel to ensure the door stops exactly when fully opened or closed. A relay or reversing switch changes the direction of the motor from opening to closing and vice versa. Most modern openers are equipped with a radio receiver, allowing you to open the door by transmitting a signal from an electronic device in your vehicle.

Follow these steps to install a garage door opener:

Step 1: Position the mechanism at the center of the door. Measure the width of the garage door and divide it in half to find the center point. Draw a short vertical line down the middle of the door's inside surface toward the top. When you attach the drawbar (the component that raises and lowers the door) to this line, it will evenly balance the door weight at the lifting point.

Step 2: Open and close the door while observing the highest point it reaches. Mark this spot, as you must mount the opener so that the rail is positioned above the peak of the door's travel. If not, the door could strike the rail as it opens.

Step 3: Check the area directly above the garage door along the vertical centerline. You need a support in this spot to attach the front end of the rail. If your garage doesn’t have a suitable structural member there, install a front mounting board. Secure a 2 X 6-inch plank across two wall studs at the highest point the door travels, using lag screws. Transfer your high-point mark to the plank and extend the vertical centerline of the door onto it.

Step 4: Follow the instructions in the kit to attach the rail to the motor unit on the garage floor. With the garage door closed, raise and secure the outer end of the rail to the front mounting plank about two inches above the marks indicating the door's high point and centerline. The rail bracket typically attaches to the plank with lag screws, but if bolts and nuts are provided, drill appropriate holes through the plank and use washers under the bolt heads to prevent them from damaging the wood.

Step 5: Lift the motor assembly until the rail is horizontal, parallel to the door track. With the motor assembly held in position, manually raise and lower the garage door to ensure the rail does not obstruct the door's movement. Once you've determined the correct position and height, secure the motor assembly to the garage joists with the metal brackets provided in the kit. If the motor assembly is positioned between joists, or if the joists run in the same direction as the rail, attach a 2 X 4 across the joists and mount the brackets to it. If the garage ceiling is finished, you can use a 3/4-inch plywood panel, fastening it to the joists with lag screws, and secure the mounting hardware with heavy-duty toggle bolts.

Step 6: Attach the drawbar to the rail carriage and move the carriage into the closed-door position. Mark the locations for the drawbar mounting screws on the garage door and drill the holes. After mounting the drawbar and drilling the holes, insert and tighten the hardware to secure the drawbar to the door.

Step 7: Adjust the drive chain or lead screw as needed, paying particular attention to the location of the bolts that limit the travel of the chain.

Step 8: Install the radio receiver and the manual push button. You can use standard bell wire for the push button, but make sure to place it where you can easily observe the garage door opener in action when you press the button. Additionally, you have the option to install a key switch for extra control.

Step 9: Connect the drive assembly cord to an extension cord, and plug the extension cord into a nearby electrical outlet. Activate the garage door using the manual push button. During the initial test, as the door rises, unplug the extension cord several times to ensure there’s no binding and that the lifting action is smooth. If any adjustments are needed, use the built-in adjustment features of the garage door opener, and also test the radio remote module to confirm it works properly.

Step 10: Unplug the extension cord, and connect the drive assembly cord to its permanent power source. If possible, plug it into the overhead light socket in the garage for convenience.

Now you're equipped to perform basic garage door repairs, whether for the door itself or the opener system.

International Publications, Ltd.