Why Window Crank Replacement Matters
Window cranks, especially on older casement windows, wear out over time. If your window is hard to open or won’t close fully, a faulty crank mechanism is often the cause. Replacing it is a cost-effective way to restore smooth operation and improve home ventilation.
Signs You Need a New Crank
The handle spins but doesn’t move the window
Window only opens partially
Crank feels loose or jammed
Visible rust or damage on the mechanism
These symptoms mean it’s time to replace the crank to avoid further damage to the frame or sash.
Tools You’ll Need
Screwdriver (flathead or Phillips)
Replacement crank (match the brand/model)
Utility knife (if there’s paint over the trim)
Safety gloves (for sharp edges)
Steps to Replace a Window Crank
Remove the Old Crank
Open the window slightly
Unscrew the handle and cover
Detach the arm from the sash bracket
Install the New Crank
Align thenew mechanism with the mounting holes
Attach the crank arm to the window sash
Tighten all screws securely
Test the Window
Open and close the window fully to ensure smooth operation
Tips for a Successful Replacement
Take a photo of the old crank for reference
Bring the old part to a hardware store to find an exact match
If unsure, check your window manufacturer’s website for part numbers
Cost of Replacement
DIY replacement costs around $15–$40 for the part. Hiring a pro may cost $75–$150 including labor. It’s a quick fix that adds years of life to your window system.
Final Thoughts
Window crank replacement is an easy home repair that anyone can do with basic tools. It restores full window function and can prevent the need for more expensive repairs down the line. Whether you're fixing one window or upgrading several, this small job makes a big difference in comfort and convenience.