The Most Common Causes of Lock Failures & How to Prevent Them

Locks are essential for security, keeping homes, offices, and businesses safe from unwanted access. However, like any mechanical device, locks can fail over time. Understanding the most common causes of lock failures and how to prevent them can save you from frustration and costly repairs. In this guide, we will explore the reasons locks fail and provide practical solutions to keep them working smoothly.

1. Wear and Tear from Frequent Use

Locks experience daily use, which can cause internal components to wear out over time. The constant turning of the key and movement of parts leads to metal fatigue, making the lock less effective.

Prevention:

Regularly lubricate the lock with graphite or silicone-based lubricant to reduce friction.
Replace old keys if they show signs of wear, as worn-out keys can damage the lock mechanism.
Consider upgrading to high-quality locks that are designed for long-term durability.

2. Key Breakage Inside the Lock

A key breaking inside the lock is a common issue, often caused by using an old, weak, or bent key. Forcing a key into a stiff lock can also lead to breakage.

Prevention:

Avoid using excessive force when turning the key.
Regularly check keys for signs of bending or cracks and replace them if needed.
Keep the lock lubricated to ensure smooth key operation.
If a key does break inside the lock, contact a professional locksmith immediately to extract the broken piece.

Check for Roadside Assistance

If you have breakdown cover or roadside assistance, such as from the AA, RAC, or your car insurance provider, check whether your policy includes car lockout services. They may be able to send a technician to help unlock your car.

3. Misalignment of the Lock and Door Frame

If a lock and door frame are not aligned properly, it can cause difficulty in locking and unlocking the door. Misalignment often happens due to door swelling, shifting foundations, or improper installation.

Prevention:

Ensure that doors are properly fitted and regularly check for any shifting in alignment.
If you notice difficulty in locking or unlocking, adjust the strike plate or door hinges.
Hire a locksmith to realign the lock if necessary.

4. Jammed or Stuck Locks

Locks can become jammed due to dirt, dust, rust, or internal damage. A build-up of debris can prevent the lock from functioning correctly.

Prevention:

Clean the lock regularly using compressed air to remove dust and debris.
Use a lubricant to keep the internal components moving smoothly.
If a lock is rusted, apply a rust remover or consult a locksmith for professional cleaning.
5. Frozen Locks in Cold Weather
During winter, moisture inside the lock can freeze, making it impossible to turn the key. This is common in areas with low temperatures and high humidity.
Prevention:
- Use a de-icing spray to melt frozen moisture inside the lock.
- Apply a silicone-based lubricant to prevent moisture build-up.
- Keep keys warm in extremely cold weather to reduce the chances of freezing.
6. Burglary or Attempted Break-In Damage
Locks can become damaged if someone tries to force their way in. Burglars often use tools like crowbars or drills to break locks, leaving them unusable.
Prevention:
- Install high-security locks that are resistant to drilling and picking.
- Use deadbolts or additional security measures to strengthen your door.
- Consider installing security cameras and alarms to deter burglars.
7. Incorrect Lock Installation
A poorly installed lock will not function properly and may be more prone to failure. Incorrectly fitted locks may not latch correctly or may wear out faster due to improper alignment.
Prevention:
- Always hire a professional locksmith to install or replace locks.
- Ensure that all components are properly secured and aligned during installation.
- Use high-quality locks suitable for your specific door type.
8. Lost or Stolen Keys
Losing keys can lead to lockouts or security risks if they fall into the wrong hands.
Prevention:
- Keep spare keys in a secure location but avoid obvious places like under the doormat.
- Consider using keyless entry systems for added convenience and security.
- If you lose a key, change the locks immediately to prevent unauthorised access.
9. Using the Wrong Key
Forcing the wrong key into a lock can damage internal components, leading to malfunction or complete lock failure.
Prevention:
- Always use the correct key for each lock.
- Label keys to avoid confusion.
- If a key gets stuck, avoid forcing it out and call a locksmith for assistance.
10. Electronic Lock Malfunctions
For those using electronic or smart locks, power failures, dead batteries, or software glitches can cause lock failure.
Prevention:
- Regularly check battery levels and replace them as needed.
- Keep a backup mechanical key or override code for emergencies.
- Ensure firmware is updated for smart locks to prevent software-related issues.
Conclusion
Lock failures can be frustrating, but with proper care and maintenance, you can prevent most issues. Regular lubrication, correct usage, and professional installation go a long way in ensuring locks stay functional for years. If you encounter any lock problems, don’t attempt DIY fixes that could worsen the issue. Instead, contact PJ Locksmiths, your trusted local locksmith, for expert assistance in lock repairs, replacements, and security upgrades.