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How to Repair a Bad Patio Door Lock

A safe patio door is an essential part of home security. If your door is difficult to lock, it can be a hassle.

In many instances, a locked that is not working is the result of misalignment or simple wear and tear. It is possible to restore the lock's function by adjusting or lubricating the lock. If these troubleshooting techniques aren't working, you can replace both the mortise as well as the handle.

Clean and Lubricate

A door lock can become difficult to open and close over time due to dust, dirt and grime. Regular cleaning and lubrication could aid in preventing your security device from becoming stiff or stuck. This will save you money on repair costs and will extend the lifespan of your door.





In the beginning, you'll need to clean the lock cylinder. To do this, you'll need spray cans of penetrating oil such as WD-40. Spray a small amount into the keyhole and work the key in and out to distribute the oil. Do not use household oil or other solvents, as they can damage your locks. Spray a bit on the key.

After cleaning your lock cylinder it's time to grease. You can apply dry lubricants such as graphite powder or sprays of silicone. Graphite is a long-lasting lubricant that doesn't attract dust, unlike liquid fluids. It's an excellent choice to lubricate locks. Silicone sprays are able to withstand freezing temperatures and are resistant to water. However, they may require multiple coats to be efficient.

You can also use de-icer spray specifically made for cold weather. It will break up frost and ice off the mechanism of your lock. A couple of sprays will help your lock unlock and then lock again easily.

The environment will determine how often you should belubricating locks. The location of your door will impact its performance. A location that is near the ocean can expose it to salty air which can cause corrosion. It is recommended to regularly lubricate your locks at least once each year, or more often when you live in an area with severe weather conditions. Lubricating your patio door locks can save money on repairs, and ensure that it continues to function properly for a long time.

Reposition the Lock Cylinder

If your patio door lock doesn't perform as it should, one or more of its parts could be damaged or misaligned. Regular inspection and prompt repair of a defective patio door lock can prevent any further damage and ensure your doors are secure. To fix a locked or unlocked patio door, tighten loose screws, adjust the lock mechanism, or replace the lock cylinder.

Begin by looking at the exterior and interior of the lock for signs of damage or misalignment. The majority of patio door locks expand and contract during temperatures that are cold or hot and can shift slightly over time. This slight movement could cause the locking mechanism to misalign and cause issues when closing or opening the door.

Examine the keyway hole on the lock cylinder. A damaged or corroded lock cylinder may be difficult to open, and could cause damage to the latch springs, cam or the lock pins. If the cylinder isn't fitting easily, you can remove any obstructions by using a pair of picklocks and tweezers. If the issue persists it may be necessary to remove the cylinder and disassemble it in order to identify the root of the problem.

If the lock cylinder isn't screwed into the lock body then you can loosen it by unscrewing an elongated screw within the faceplate of the cylinder. This screw will let you rotate the cylinder, and may even help restore the proper alignment.

Look for an elongated tab that moves with the key. It is usually near the end. This little clip, also known as a "release tab", keeps the cylinder from sliding all the way into the body of the lock. This tab can be removed with a standard key to allow the cylinder to be removed, then it can be inserted.

If your lock's cylinder is stuck, you might be able restore proper alignment by turning it until the latch bolt connects with the strike plate and the knob or handle can be pushed into and withdrawn. Reassemble the lock after you have restored proper alignment. Test it for functionality. If your patio door lock is still difficult to use, it's likely that another component such as the latch spring or latch is damaged or worn out and may require replacement.

Tighten the Screws

Over time, the use of regular as well as cold and hot weather dust, dirt and even dirt can take their toll on patio door locks. These delicate components can be damaged if not properly maintained, causing your door to stop locking properly. Most lock problems are easily solved with just a few steps.

You should first clean the lock mechanism. Use a damp cloth to remove any dust or dirt that might be found. Then, dry the components thoroughly. After cleaning, a small amount of silicone-based lubricant can help keep the moving components functioning smoothly and efficiently. Avoid lubricants that have oil bases since they could attract dust and debris and cause additional issues.

If RepairMyWindowsAndDoors is fitted with a security footlock, ensure that the footlock is properly aligned with the strike plate. In most instances, this will require adjusting the screws that secure the foot lock to the frame of your patio door. Remove the screw using a Robertson screwdriver, and then gently move it upwards or downwards to adjust the foot lock as needed. Once the adjustment has been completed, tighten the screw.

The most common problem in the repair of patio door handles is misalignment of the latch and strike plate. This can be caused by normal wear and tear, or it could simply be due to the fact that the latch is positioned higher or lower than it should be.

Then, take off the handle that was previously used and locate the screws or bolts holding it in place. Be sure to keep track of these since you will need them when installing the new handle. Then, take off the old spindle and place the new one into place on the interior of the door. Make sure that it is properly aligned with the holes in both the interior and exterior handle. Install the exterior and interior handles once the spindle is been installed. Make sure they are aligned properly with the screws or bolts that hold them in place.

Once you've made any necessary adjustments to your patio door, make sure to test it by closing and locking the door. If the door is correctly aligned, it should be able to open and close smoothly without the need for any additional force. If you're still experiencing difficulty then you may need to reposition the strike plate or latch or the lock's cylinder might be damaged and require to be replaced.

Replace the latch

If your patio door locks don't work, it may be time to replace the latch. Most homeowners can change the lock themselves. Begin by sliding the patio doors completely out and then removing your existing lock on the inside of the door. Study the existing lock to determine the type of lock that you'll require.

Before installing the new latch, loosen screws that secure the strike plate. This is the part of the lock mounted on the edge of the door's frame. Adjust it horizontally or in the vertical direction to align it with the holes in the latch. Once you have repositioned the latch plate you can tighten the screws, then screw it in place.

After all the components have been moved or adjusted then assemble and secure the patio door in accordance with the instructions given by the manufacturer. When you're done checking the latch. Check to see if it fits properly and catches the latch when the door is shut. If it does, your patio door lock is installed correctly and is now ready to provide the security and privacy you've come to expect from.

Patio doors, like other components of your home must be aligned correctly to function effectively. Over time, cold and hot weather, dirt and debris, and other factors can cause hinges, door frame and the locking mechanism to shift. If these parts aren't aligned, it's like trying to fit a key in the wrong hole for a key it won't work. By following these simple steps, you will be able to fix an issue that appeared to be unfixable. You should pat yourself on the back for taking on the project and reclaiming the patio door's closed position! We're betting you won't face any more trouble opening or closing the door from now to the end. Have fun! We're here to help if you have any questions or concerns.