Are you tired of wrestling with a door latch that just won’t cooperate? Dealing with stubborn door latches can be really frustrating. This guide will walk you through common reasons why door latches won’t retract and provide solutions to help you fix them like a pro.
Table of Contents
Position of Strike Plate not Aligned with Door
A badly positioned strike plate can indeed prevent a door from latching properly by simply getting in the way of the latch. It’s an easy fix but one that requires a little bit more diagnosing so that you can fix it correctly.
Strike Plate Hole not Complete
Sometimes, the hole in the strike plate may not be large enough or deep enough to accommodate the latch bolt, making it difficult for the door latch to retract. If you just bought the knob set and this is the issue, take it back as defective. But if that isn’t an option, use a dremel or chisel tool to increase the size of the hole in the strike plate.
Misaligned Strike Plate
A misaligned strike plate is the most common cause of a door latch not retracting easily. The strike plate hole may not align correctly with the latch, causing the latch bolt to hit the edge of the strike plate rather than sliding smoothly into the hole.
How to Fix a Bad Strike Plate
- Remove Strike Plate Screws: Use a screwdriver to remove the screws securing the strike plate to the door frame
- Reposition Strike Plate: If the hole in the strike plate is misaligned or incomplete, use a pencil to mark the correct position for the hole
- Adjust Strike Plate: Using a chisel or a rotary tool, carefully enlarge or deepen the hole in the strike plate as needed to ensure a proper fit for the latch bolt
- Fill Previous Screw Holes: To prevent the strike plate from coming loose after it is reinstalled, fill the previous screw holes with toothpicks before reinstalling the strike plate
- Reattach the Strike Plate: Once the hole in the strike plate is properly aligned and sized, reattach the strike plate to the door frame using the screws you removed earlier
- Test the Door: Close the door and test the latch to ensure that it retracts smoothly into the strike plate without any resistance or sticking
Stuck Door Latch
Often, a door latch won’t retract because it is defective or in need of basic maintenance. This is easier to fix than a mechanical problem like the strike plate. However, this basic maintenance can not only repair a stuck door latch but prevent it from happening as well.
Clean Your Door Latch
Over time, dirt, dust, and debris can accumulate inside the latch mechanism, causing it to stick or bind. To fix this, start by taking the door latch apart and cleaning the latch thoroughly with a soft brush or cloth to remove any buildup.
Use a mild detergent or solvent such as dish soap if necessary to dissolve stubborn residue. Once clean, test the latch to see if it operates smoothly and lubricate before reinstalling.
Lubricate Door Latch
Applying a lubricant to the latch mechanism can help reduce friction and improve its operation. Choose a silicone-based lubricant or graphite powder specifically designed for use on door hardware. Do not use WD-40 because it will attract dirt and dust later which will cause the latch to stick again.
Apply a small amount of lubricant to the moving parts of the latch, including the bolt and spring mechanism, and work it into the mechanism by operating the latch several times. This should help loosen any stuck components and restore smooth movement.
Replace the Mechanism
If cleaning and lubricating the latch do not resolve the sticking issue, it may be necessary to replace the latch mechanism entirely. Door latches can wear out over time, especially if they are subjected to frequent use or exposure to harsh environmental conditions.
Remove the old latch and take it into the hardware store as an example. Be sure to choose a replacement latch that is compatible with your door and hardware. For most people, there are two major types of door hardware (Kwikset and Schlage) so you just have to choose one compatible with your door hardware.
Plunger is Stuck (on Exterior Door Knobs)
For exterior latches, the plunger mechanism may become misaligned, stuck, or damaged, causing the latch to stick. To fix this, inspect the plunger for any signs of wear or damage. Repair or replace it the same way you would the whole latch mechanism.
Position of Door
Even if the door latch works perfectly, a misaligned door will prevent the latch from retracting. There are a few different ways for doors to be misaligned that are easy to fix.
Door Hole
The hole for the door knob, or bore, is almost always at a standard height from the floor. If the hole drilled for the latch assembly is misaligned with the door jamb, the latch bolt may not fully engage with or retract from the strike plate. This can be fixed the same way you would repair a misaligned strike plate. Use a chisel or rotary tool to enlarge the strike plate hole if necessary, and reposition the strike plate to align with the latch bolt.
Sagging Door
Over time, doors may sag or shift out of alignment due to changes in humidity, settling structure, or improper installation. A sagging door can cause a door latch not to retract all the way because of the friction against the strike plate.
To correct a sagging door, tighten or loosen the hinges to ensure the door sits squarely in the frame. When hung properly, there should be an even gap or line between the door and the jamb all the way around. If the door continues to sag, you may need to add shims or hinge spacers to realign the door within the door jamb.
Loose Hinges
Loose or improperly installed door hinges can also affect the position of the door within the door jamb. If the hinges are loose, remove the screws securing the hinges to the door frame and door. Inspect the hinge screws and screw holes for damage or wear. Fill the previous screw holes with toothpicks to tighten them up and then use longer screws when you reinstall the hinges for extra grab.
Expansion or Contraction of Door
Doors expand and contract with both humidity and temperature changes. Not only will this expansion and contraction affect the size and shape of the door, but it could easily cause the latch to be misaligned.
During periods of high humidity, wooden doors can absorb water and expand, resulting in a tighter fit within the door frame. In this case, the latch bolt may not align properly with the door jamb, preventing the latch from fully engaging and causing the door to stick or bind.
Conversely, during periods of low humidity, wooden doors lose moisture and contract, causing gaps to form between the door and the door frame. In some cases, the latch bolt may not extend far enough to reach the strike plate, preventing the door from latching securely.
To prevent these issues and minimize their effects, consider sealing and weatherstripping the door. Apply a waterproof sealant or paint to the door edges, door faces, and frame to protect against moisture infiltration. Install weatherstripping along the door frame to create a tight seal and reduce air infiltration.
Uncommon Causes of a Door Latch Not Retracting
Not every door latch stops working because of something simple like misalignment or debris stuck in the mechanism. While not common, there are multiple reasons other than those listed previously that could explain a latch not working.
Broken Spindle
If the spindle becomes worn or breaks, the knob turning won’t transfer to the latch retracting, preventing the latch from retracting or extending properly. There is no way to repair a broken spindle, it has to be replaced completely.
Loose or Overtightened Screws
Screws that hold the door knob together can become loosened over time or be installed too tightly, causing stress on the internal components of the door knob assembly. This stress can lead to cracks or damage to the knobs, spindle, or other internal mechanisms, preventing the door latch from operating smoothly.
Something Blocking the Latch
Sometimes, foreign objects or debris can become lodged inside the latch mechanism, preventing the latch bolt from retracting or extending properly. This can occur if the door is slammed shut with excessive force or if something is caught in the latch mechanism during normal operation.
Worn or Broken Springs
Springs inside the door knob assembly help to return the knobs to their default position after they are turned. If these springs become worn or break, the knobs may not return to their proper position, causing the latch mechanism to malfunction and preventing the door from latching properly.
Parts of a Door Knob
Several components of a door knob can break or malfunction, leading to issues with the door latch. Just like other door pieces you need to know the proper vocabulary and how each piece of the door knob functions when everything is working so that you can fix it.
Spindle
The spindle is the metal rod that connects the inner and outer knobs that your hand holds of a door knob assembly. When you turn the knob, the spindle rotates, allowing the latch mechanism to retract or extend the latch bolt. Spindles come in various lengths to accommodate different door thicknesses as well as different shapes for different manufacturers.
Cylinder
The cylinder, also known as the core or lock cylinder, is the central component of the lock mechanism. It contains the keyway, where the key is inserted to operate the lock. Inside the cylinder, pins and springs work together to secure or release the lock mechanism.
Strike Plate
The strike plate is a metal plate attached to the door jamb opposite the latch mechanism. When the door is closed, the latch bolt extends into the strike plate, securing the door in place. The strike plate helps distribute the force of the latch bolt and protects the door jamb from damage.
Spring
The spring is a small, coiled component inside the door knob assembly that helps return the knobs to their default position after they are turned. The spring provides tension to the knobs, ensuring that they return to the proper position and engage with the latch mechanism.
Latch
The latch, also known as the latch bolt or latch mechanism, is the component that extends or retracts when the door knob is turned. It engages with the strike plate to secure the door in place when closed. The latch mechanism may include a beveled edge to facilitate smooth operation and reduce friction against the strike plate. On exterior doors, there is a small plunger on the flat side of the latch bolt.
Box
The box, or housing, is the outer casing of the door knob assembly that encloses the internal components, including the spindle, cylinder, spring, and latch mechanism. Today’s door knobs do not commonly have a recognizable box. The box provides protection and support for the internal components and attaches to the door surface with screws or bolts.
How do I Open a Door When the Latch is Stuck?
We’ve all heard of people getting stuck inside or outside of a place when the door latch is stuck. There are several things to try before trying to break the door down.
Hit it gently with a hammer
Do not hit your latch hard with your hammer. Gently tap the knob while attempting to turn it. Sometimes,this can help release the latch and open the door. Experiment with different angles and directions of pressure to see if the latch disengages.
Use a Credit Card or Flat Screwdriver
Insert a thin object such as a credit card, ID card, screwdriver, or putty knife between the door and the door frame. Slide the card or tool between the latch bolt and the strike plate while simultaneously turning the knob and applying pressure to the door. This may help release the latch and allow the door to open.
How do I Keep my Latch Working Correctly?
Of course, the best scenario is to prevent the latch from becoming stuck in the first place. With regular maintenance, a good door knob can work for decades.
Regularly Apply Graphite Lubricant
Using graphite lubricant is an effective way to keep your door latch working smoothly and prevent sticking or binding. Graphite lubricant is usually available in spray or powder form. To apply graphite lubricant, simply spray a small amount directly onto the latch mechanism and operate it a few times. Regular application of graphite lubricant is recommended as part of your door maintenance routine to keep your door latch functioning smoothly.
Clean with Triflow
If your latch mechanism is dirty and needs cleaned, Tri-Flow is an excellent product to clean it with. Take the door knob pieces apart, spray the Tri-Flow on, and wipe clean with a fresh rag or cloth. Doing this every 5-7 years will help door knobs that are exposed to any smoke or weather conditions.
Protect from Smoke and Weather
If smoke or weather are concerns, opt for door latches and hardware that are specifically designed to withstand them. Look for products made from stainless steel or corrosion-resistant alloys.
Especially for these knobs, perform regular maintenance on your door latch and hardware to keep them in optimal condition. Inspect the knob, door, and frame annually for signs of water damage or deterioration, and address any issues promptly.
Conclusion
Resolving a stuck door latch is an essential skill for any homeowner. By following the simple steps outlined here, you can effectively troubleshoot and address common issues that cause door latches to stick. And just remember that if you can’t fix it, you can always replace it. So there’s no harm in trying.