Handyman

Window Lock Repair: Security and Function

January 5, 2025

Handyman Team

4 min read

Window Lock Repair: Security and Function

A window that doesn't lock properly is a major security concern and can also prevent the window from sealing correctly, leading to drafts. Most window lock problems are due to misalignment, loose hardware, or a broken mechanism. These are often simple fixes that you can handle yourself to restore your window's security and function.

🤔 Common Problems and Solutions

Start by diagnosing the issue.

misalignment

Problem: The Lock Won't Engage. The most common issue is that the two halves of the lock (the cam lock and the keeper) are misaligned because the window sash has settled over time.

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Problem: The Lock is Loose. The screws holding the lock or keeper have become loose or stripped out of the window frame.

broken

Problem: The Lock is Broken. The internal mechanism of the cam lock has broken, and the lever just spins or is stuck.

🔧 How to Fix a Misaligned Lock

This usually involves adjusting the keeper (the receiving part of the lock).

Close and lock the window as far as it will go.

Observe where the cam is hitting the keeper. Loosen the screws on the keeper.

Slide the keeper slightly until it aligns with the cam lock and tighten the screws. Test the lock.

🔩 How to Replace a Broken Lock

If the lock mechanism itself is broken, it needs to be replaced.

Lock Replacement Steps:

Unscrew and remove the old, broken lock mechanism.
Take the old lock to a hardware store to find an exact replacement. Window hardware can be very specific, so bringing the old part is crucial.
Screw the new lock into place using the existing holes.

For vinyl or aluminum windows, be careful not to over-tighten screws, as this can strip the material. If a screw hole is stripped, you can often use a slightly larger-diameter screw to get a new grip.

Don't compromise your home's security with a broken window lock. If you can't find a replacement part or the window itself needs repair, contact Handyman In A Box. Our handyman professionals can repair or replace all types of window hardware.