A broken doorknob can be a frustrating problem, whether it’s jammed, loose, or simply not working as it should. Fortunately, replacing a doorknob is a simple DIY task that requires minimal tools and can be completed in under 30 minutes.
In this guide, we’ll walk you through how to replace a broken doorknob with easy-to-follow steps. Whether you’re dealing with an interior or exterior door, this guide will help you get the job done efficiently.
Why Replace a Broken Doorknob?
A malfunctioning doorknob can cause various issues, from security risks to difficulty opening or closing doors. Here are some common reasons why you might need to replace a doorknob:
✔️ The doorknob is loose or wobbly – This could mean the internal mechanism is worn out.
✔️ The latch is sticking or not retracting properly – A faulty latch can make it difficult to open or close the door.
✔️ The key won’t turn in the lock (for exterior doors) – This may indicate a broken lock mechanism.
✔️ The doorknob is completely broken – If the handle falls off or stops turning, it’s time for a replacement.
What You’ll Need
Before you start, gather the following tools and materials:
✔️ A new doorknob set – Make sure it’s the right type (passage, privacy, or keyed entry) for your door.
✔️ A Phillips screwdriver – Most doorknobs use Phillips screws for easy removal and installation.
✔️ A flathead screwdriver (optional) – Useful for prying off cover plates.
✔️ Tape measure (optional) – To confirm the backset size (distance from the door edge to the center of the doorknob hole).
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Step-by-Step Guide to Replacing a Broken Doorknob
Step 1: Remove the Old Doorknob
1. Unscrew the Doorknob
- Locate the screws on the interior side of the doorknob.
- Use a Phillips screwdriver to remove them. If the screws are hidden, look for a small hole where you can insert a flathead screwdriver or a pin to release the knob.
2. Separate the Knobs
- Once the screws are removed, gently pull both sides of the doorknob apart.
- The exterior and interior knobs should come off easily.
3. Remove the Latch Assembly
- Unscrew the two screws on the edge of the door where the latch is located.
- Pull the latch assembly out of the hole. If it’s stuck, wiggle it slightly to loosen it.
Step 2: Prepare for the New Doorknob Installation
Before installing the new doorknob, check the following:
🔹 Backset measurement – Most doors have a standard backset of either 2-3/8 inches or 2-3/4 inches. Ensure your new doorknob matches.
🔹 Door hole size – Confirm that the new doorknob fits the existing hole in the door.
🔹 Door thickness – Most doorknobs fit standard door thicknesses (1-3/8 inches to 1-3/4 inches).
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Step 3: Install the New Doorknob
1. Insert the New Latch Assembly
- Slide the new latch into the hole on the door’s edge.
- Make sure the curved side of the latch faces the direction in which the door closes.
- Secure the latch with the provided screws using a Phillips screwdriver.
2. Attach the Exterior Knob
- Align the exterior knob with the latch assembly, making sure the spindle (metal rod) goes through the latch opening.
3. Attach the Interior Knob
- Align the interior knob with the exterior side and fit it over the spindle.
- Insert the screws into the mounting holes and tighten them securely.
🔹 Pro Tip: If the screws are hidden behind a cover plate, pop off the plate using a flathead screwdriver before securing the screws.
Step 4: Test the Doorknob
Once the new doorknob is installed, test it by:
✔️ Turning the knob to ensure it moves smoothly.
✔️ Checking if the latch retracts properly when the handle is turned.
✔️ Closing the door and ensuring it latches securely.
✔️ (For locking doorknobs) Testing the lock mechanism with the key or thumb turn.
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Choosing the Right Doorknob for Your Door
There are different types of doorknobs, so make sure you choose the right one for your needs:
🔹 Passage Doorknob: Ideal for interior doors that don’t need a lock, like hallways and closets.
🔹 Privacy Doorknob: Used for bedrooms and bathrooms, featuring a simple lock on one side.
🔹 Keyed Entry Doorknob: Designed for exterior doors, requiring a key for locking and unlocking.
🔹 Dummy Doorknob: A fixed handle used for decorative purposes on closet doors.
Common Mistakes to Avoid
🚫 Over-Tightening the Screws: This can cause the doorknob to feel stiff or misaligned.
🚫 Installing the Latch Backward: Ensure the slanted side of the latch faces the door frame for proper function.
🚫 Forgetting to Test the Doorknob Before Finishing Up: Always check the operation before fully securing the screws.
🚫 Buying the Wrong Size: Double-check the backset and door thickness to avoid compatibility issues.
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Additional Tips for Doorknob Maintenance
To keep your doorknobs in good working condition, follow these maintenance tips:
✔️ Tighten Loose Screws Regularly: Check the screws every few months to prevent the doorknob from becoming wobbly.
✔️ Lubricate the Latch Mechanism: Use a silicone-based lubricant if the latch starts to stick.
✔️ Clean Doorknobs Frequently: Use a mild cleaner to remove dirt and germs, especially for high-traffic doors.
✔️ Replace Worn-Out Keys: If you’re struggling with a worn-out key, consider getting a replacement before it breaks inside the lock.
Conclusion
Replacing a broken doorknob is a quick and easy fix that improves the functionality and security of your doors. With just a few basic tools and the steps outlined in this guide, you can install a new doorknob like a pro.
Next time you face a faulty door knob, don’t stress, just grab a screwdriver and take care of it yourself!
ZAK Engineer is an experienced engineer with 15 years in the mechanical and industrial sectors. Holding advanced degrees and multiple certifications in engineering, he combines technical expertise with a passion for writing to provide valuable insights into engineering innovations and business strategies. His content empowers professionals to excel in their fields and stay updated with the latest industry trends.