Why Is My Door Lock Sticking? Common Causes & Fixes

 

Why Is My Door Lock Sticking?

A sticky lock usually means the internal mechanism isn’t moving freely. Common causes include:

1. Dirt, Dust, or Debris Inside the Lock

Over time, grime can accumulate inside the lock cylinder, making it harder for the key to turn. This buildup can come from environmental factors like dust or from lint and dirt transferred by your key.

2. Lack of Lubrication

Without proper lubrication, the lock's internal components can become dry and create friction, leading to sticking. Using the wrong type of lubricant, such as oil-based products, can exacerbate the problem by attracting more dirt.

3. Misaligned Strike Plate

If the door or strike plate has shifted due to settling or temperature changes, the latch may not align properly, causing the lock to stick.

4. Worn or Bent Key

A key that's bent or worn can have difficulty engaging the lock pins correctly, leading to sticking.

5. Internal Wear or Damage

Over time, the internal components of a lock can wear out or break, especially with frequent use, resulting in sticking or jamming.

 

How to Fix a Sticky Lock

1. Clean the Lock

• Use a can of compressed air to blow out any dust or debris from the keyhole.

• Insert and remove the key several times to help dislodge any remaining particles.

2. Lubricate with Graphite Powder

• Apply a small amount of graphite powder into the keyhole.

• Insert the key and turn it several times to distribute the lubricant.

• Avoid using oil-based lubricants like WD-40, as they can attract more dirt over time.

3. Check and Adjust the Strike Plate

• Close the door slowly and observe if the latch aligns with the strike plate.

• If misaligned, adjust the strike plate by loosening the screws and repositioning it.

• Tighten the screws securely after adjustment.

4. Inspect the Key

• Examine your key for signs of wear or bending.

• If the key is damaged, have a new one cut from the original or a reliable duplicate.

5. Tighten Loose Hardware

• Check the screws on the lock and door handle.

• Tighten any that are loose to ensure the lock mechanism is secure.

 

When to Call a Professional

If you've tried the above steps and the lock is still sticking, or if the key breaks off inside the lock, it's time to consult a professional locksmith. Persistent issues may indicate internal damage that requires expert repair or replacement.