Andersen® casement and awning windows both use similar lock mechanisms, which are the latches that secure your window shut. Casement windows can have one (1) or two (2) lock mechanisms, while awning windows always have two (2) on the left and right side of the window frame.
How to Order Replacement Locks for Andersen® Casement and Awning Windows
The locks on your Andersen® casement or awning windows can vary depending on what year the window was manufactured. Ordering and installing replacement lock mechanisms or lock parts can be done in a few quick steps, outlined below.
The lock mechanisms listed below are either hidden inside your window's frame or fully visible. The lock mechanism secures into a keeper, which is typically located on the window sash itself. Below are links for replacement locks and keepers.
This Article Will Help You:
- Determine your window's vintage, style, and handing.
- Order the correct replacement lock.
- Find next steps to replace the locks.
Let's Get Started
1. Determine Your Window's Vintage, Style, and Handing
Before ordering, follow these first steps to ensure you order the correct replacement part for your window.
- Determine your window's vintage, or when it was manufactured. See Identify Glass Type on Andersen® Windows and Patio Doors for instructions to locate and learn when your window was manufactured.
- Does your window open like a book or a laptop?
- If it opens like a book, see Casement Window Unit and Replacement Part Handing, to determine your window's handing. Some locks and lock parts are designed for use on a specific side of your window and must be ordered correctly.
- If your window opens like a laptop, see Awning Window and Replacement Part Handing, to determine your lock's handing.
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400 Series Casement Window
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400 Series Awning Window
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2. Order Replacement Locks
To order replacement locks or lock parts: identify your window type, identify your lock or lock part, and then follow the instructions to order a replacement. Once you receive your replacement lock, follow the correct replacement instructions per your window type below.
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Window Type
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Lock or Lock Part
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Order and Replace
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400 Series
Casement & awning windows pre-1995
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Vintage Exposed Window Lock, right, and Keeper, left
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- Once you know your lock's handing and window vintage, order the correct replacement lock and keeper
 from the Andersen Parts Store. - For replacement instructions, see Sash Lock Replacement Guide (0003004).
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400 Series
Casement & awning windows, 1995 to 1998
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Vintage Concealed Window Lock and Screws
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- Once you know your lock's handing and window vintage, order the correct replacement lock from the Andersen Parts Store.
- For replacement instructions, see Concealed Lock Installation for Casement and Awning Windows.
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400 Series
Casement & awning windows, 1995 to 1998
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Vintage Keeper
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- Once you know your lock's handing and window vintage, order the correct part:
- For replacement instructions, see Concealed Lock Installation for Casement and Awning Windows.
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A-Series & 400 Series
Casement and awning windows, 1999 to present
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Modern Concealed Window Lock and Screws
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- Once you know your lock's handing and window vintage, order a left-hand lock or a right-hand lock from the Andersen Parts Store.
- For replacement instructions, see Concealed Lock Installation for Casement and Awning Windows.
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400 Series
Casement & awning windows, 1999 to present
Note: Keepers are not handed.
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400 Series Casement and Awning Window Sash Keeper
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- Once you know your window's vintage, order the replacement casement and awning keeper from the Andersen Parts Store.
- Contact Andersen® Windows and Doors for assistance ordering a replacement keeper for A-Series casement or awning windows.
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100 Series
Casement & awning
Note: Andersen 100 Series casement and awning window locks are universally handed.
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100 Series Casement and Awning Window Lock Drive
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Once you know your window's vintage, order the pre-April 2015 lock or post-April 2015 lock from the Andersen Parts Store.
- See Lock Handle/Bezel and Operator Handle/ Cover Replacement Guide (9050359) for replacement instructions.
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100 Series
Casement & awning
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100 Series Casement and Awning Window Sash Keeper
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- Once you know your window's handing, order the replacement 100 Series keeper.
- Replace the old keeper with the new one.
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If you couldn't find the exact part you're looking for, or want assistance ordering a replacement lock or keeper, Contact Andersen® Windows and Doors.
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