When to Call a Locksmith: 6 Signs You Need Help

1. Your Lock Has Become Stiff or Unreliable

If a key that previously turned smoothly now catches, resists or needs repeated attempts, do not assume that the problem will disappear by itself. The cause could be a worn key, a misaligned door or a fault inside the lock.

Notice whether the problem occurs every time or only when the door is closed. This detail may help a locksmith identify whether the door alignment is contributing to the issue.

Avoid forcing the key, as it could bend or break. If the lock continues to stick, arrange an assessment. Where the mechanism cannot be repaired reliably, lock replacement may be an option, depending on the lock and the fault.

2. Your Key Breaks or Gets Stuck

A broken key can prevent you from entering or securing your property. If part of the key remains inside the lock, stop turning it and avoid pushing the fragment further in.

Improvised tools or glue can damage the lock and make removal more difficult. A locksmith can assess whether the broken piece can be removed and whether the lock is still safe to use.

If the key is damaged but has not broken inside the lock, keep it and explain what happened when requesting help. A locksmith may be able to advise on the next steps after assessing the key and the locking system.

3. You Cannot Get Into Your Property

A lockout can happen because keys have been misplaced, left inside or become unusable. First, check that you have not overlooked a spare key held by someone you trust and that any alternative entrance is both authorised and safe to use.

Avoid climbing through windows or forcing the door. These approaches can cause injury or property damage.

If you cannot regain access safely, a locksmith may be able to help. Visit our locked-out service page for relevant information. If you need urgent assistance, explain whether anyone is at risk or whether access is completely blocked.

4. Your Door Will Not Lock Properly

A door that will not lock is not just inconvenient; it may leave your home or business unsecured. The cause might be a faulty cylinder, a failed mechanism, loose hardware or a door that has moved out of alignment.

Check for obvious signs such as the door catching against the frame or a handle that suddenly feels different. Do not repeatedly force the handle or key to make the locking points engage.

If the problem is with a uPVC door, the multipoint mechanism may need specialist assessment. Our uPVC specialist locksmith service page explains the relevant service option.

If the property cannot be secured, contact a locksmith promptly and describe the fault. You can also review our emergency locksmith service information if the situation needs urgent attention.

5. You Have Lost Keys or Cannot Account for Them

Losing a key does not automatically mean every lock must be replaced. The level of concern depends on whether the key can be linked to your address, whether it may have been stolen and who could use it.

If you have recently moved, changed tenants or discovered that a key has not been returned, review who still has access to the property. Depending on the circumstances, changing or reconfiguring the lock may be a sensible precaution.

For more detail, read our article about what to do when you lose your keys. It can help you consider the practical next steps before deciding whether a lock change is needed.

6. Your Lock or Door Has Been Damaged

Visible damage following an attempted break-in, forced entry or an accident should be assessed carefully. Even if the key still turns, damage to the lock, door or frame may affect how securely the property can be locked.

If you suspect an intruder is present or there is an immediate threat, move somewhere safe and contact emergency services where appropriate. Once it is safe, arrange for the damaged entry point to be assessed.

Depending on the condition of the door and locking system, the work may involve repairing the frame, adjusting the door or replacing damaged components. Ask the locksmith to explain the findings and proposed work before proceeding.

How to Choose the Right Locksmith Service

When contacting a locksmith, describe the issue clearly rather than relying on a general label such as “broken lock”. Explain whether you are locked out, whether the door can still be secured and what happens when you use the key or handle.

Before booking, confirm:

• The call-out fee and whether it includes any work.
• The likely labour and parts costs.
• Whether additional charges may apply outside normal hours.
• Whether the locksmith has experience with your type of lock or door.
• That you will be told about additional work before it is carried out.

If you are considering changing the lock, read about the lock-change service and discuss whether replacement is necessary or whether a repair may be suitable.

For other locksmith services, visit the N1 Locksmiths services page. If you are based in North London, you can also check the North London coverage page and confirm availability for your address.