Casement Window Won't Crank: Operator and Handle Fixes

Casement windows open outward with a crank. When they work, they are easy to use and close up tight. When the crank stops working, you are left with a window that will not open, will not close all the way, or a handle that spins without doing anything. In most cases the fix is a part, not a new window.

How a casement window opens

Turning the crank handle turns a gear inside the operator, the mechanism at the bottom of the window. The operator moves an arm, and the arm pushes the sash open or pulls it closed. The sash swings on hinges at the top and bottom. A problem with any of those parts shows up at the crank.

Find which part failed

The way the crank misbehaves tells you a lot.

• The handle spins freely and the window does not move: the inside of the handle is stripped, or the splined shaft on the operator is worn. Pull the handle off and look. If the grooves inside the handle are worn smooth, the handle is the problem. If the shaft is worn, the operator needs replacing.
• The crank turns but grinds, skips or clicks: the gears inside the operator are stripped.
• The crank is very hard to turn: the hinges or the track may be dirty or dry, or the sash may be dragging.
• The window opens but will not close tight: the arm may be bent, a hinge may be worn, or the sash may have dropped.
• The arm has come loose from the sash: a clip or bracket under the sash has let go.

Before replacing anything, open the window and clean the hinge tracks. Old grease and dirt make the operator work harder and can strip the gears.

Replacing the crank handle

If only the handle is stripped, a new handle is the easy fix. Crank handles are matched by the size of the splined shaft they fit. Our crank handle fits operators with an 11/32 inch spline and comes in several colors. Check your shaft before ordering, since not every operator uses that size.

Replacing the operator

If the gears or the shaft are worn, the operator is replaced as a unit. Operators are matched by:

• The style, such as a single arm or dual arm operator
• The hand, left or right, depending on which side the window hinges
• The length of the arm
• The way the operator mounts to the frame

The window operators and cranks section of our shop has left and right casement operators in more than one arm length, plus dual arm operators. Operator covers and tracks are in the shop too. If you are not sure which one you have, take a clear photo of the operator with the window open and call us before you order.

Swapping an operator means detaching the arm from the sash, removing the trim or cover over the operator, and unscrewing it from the frame. On some windows that is straightforward. On others the arm is hard to free, the screws are stripped, or the sash needs support while the arm is off. If the window is above the first floor, have a pro do it, since the sash can swing open once the arm is free.

When it is more than the crank

Sometimes the crank is fine and the window is the problem. Worn hinges let the sash sag so it rubs the frame and will not close tight. A warped or rotted sash can bind no matter how good the operator is. A lock that does not line up keeps the window from pulling in snug. Our window repair service covers the mechanics, meaning balances, locks and cranks, and the sash itself.

Keep it working

A few habits make operators last longer. Clean the hinge tracks once or twice a year and wipe on a light coat of lubricant made for window hardware. Crank the window fully closed and lock it, rather than leaving it cracked open in the wind, which strains the arm. In winter, do not force a window that is frozen shut. Let it warm up, or clear the ice from the outside first, because forcing the crank is a quick way to strip the gears.

If the window is hard to crank only in cold weather, ice or stiff old grease in the hinge track is a likely cause, and cleaning the track before winter helps.

What affects the cost

A handle swap is a small job. An operator replacement depends on the operator style, whether the part is still made, how hard the old one is to remove, and whether hinges or locks need attention too. A free quote is the way to get an exact answer.

Get it working again

Order the part, or let us handle it. Call (248) 250-8000 if you need help finding the right one, or request a free quote. We repair casement windows for homeowners across Metro Detroit (Macomb, Oakland and Wayne Counties).