How to Fix a Door Knob That Is Broken

A broken door knob needs to be replaced — but the process is simpler than most people think. This guide walks you through removing the old knob and installing a new one in under 30 minutes.

Types of Broken Door Knobs

• Knob spins freely: The internal mechanism has disconnected from the spindle
• Knob snapped off: The knob body has broken away from the rose plate
• Internal spring broken: The knob turns but doesn't spring back
• Latch won't retract: The mechanism is broken and the latch is stuck
• Knob fell off completely: The mounting screws failed

Step 1: Remove the Broken Knob

The removal method depends on the knob type:

• Set screw type: Find the small screw on the knob neck, loosen with an Allen key, pull the knob off
• Through-bolt type: Remove the two screws on the rose plate, pull both knob halves apart
• Snap-fit type: Insert a thin tool into the small hole on the rose plate to release the catch, pull the knob off

Step 2: Remove the Latch Assembly

After removing the knobs, unscrew the two screws on the latch faceplate on the door edge. Pull the latch assembly out of the door.

Step 3: Note the Measurements

Before buying a replacement, note:

• Backset: Distance from door edge to center of knob hole (usually 2-3/8" or 2-3/4")
• Door thickness: Usually 1-3/8" or 1-3/4"
• Hole diameter: Usually 2-1/8" for the knob, 1" for the latch

Step 4: Install the New Latch

Insert the new latch assembly into the door edge hole with the angled face of the latch bolt pointing toward the door stop. Secure with the two faceplate screws.

• Door Latch Kit with Built-in Scoring & Chisel Tools — fits square or round latch, 1-3/8" or 1-3/4" doors

Step 5: Install the New Knob Set

Thread the spindle through the latch mechanism, align the mounting holes, and secure with the provided screws. Install both knob halves and tighten the set screw or mounting screws.

• CML Keyed Entry Door Knob Set — solid stainless steel, includes latch and all hardware, fits standard door prep

Step 6: Test and Adjust the Strike Plate

Close the door and test the latch. If it doesn't align with the strike plate, adjust the plate position or file the opening slightly.

• Gator Door Strike Plate — universal replacement if the existing plate is worn

Choosing the Right Replacement Knob

• Passage knob: No lock, for hallways and closets
• Privacy knob: Push-button lock, for bathrooms and bedrooms
• Keyed entry knob: Key lock, for exterior doors
• Dummy knob: Non-functional, decorative only