What’s Happening

When a replacement window stops working, the problem is almost always one of three things: a failed balance system that makes the sash too heavy to lift, a broken hardware component like a locking cam or tilt latch, or a warped or swollen frame that has seized the sash in place. Any of these can develop in windows that are otherwise in decent shape, and none of them mean you need to replace the window again.

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That said, a window that won’t open or close fully is not just inconvenient. If it’s a window you count on for ventilation or emergency egress – a bedroom or a second-floor room, for example – it’s worth getting eyes on it sooner rather than later. The good news is that most of these failures are diagnosable in about ten minutes by someone who knows what to look for, and most repairs are straightforward once the cause is confirmed.

Why It Happens

Failed or Broken Balance System

Balances are the spring-loaded or block-and-tackle mechanisms that counterweight a double-hung sash so it stays where you put it and moves smoothly. When a balance wears out or breaks, the sash either drops when you let go, refuses to budge from the bottom, or takes both hands and real effort to move a few inches. If you can hear a distinct snap when you try to lift the window, or if one side of the sash seems to drag while the other moves freely, a balance is almost certainly the culprit. Balance systems are under tension and should only be handled by a trained technician.

Broken or Seized Lock Hardware

The cam lock and keeper on a single or double-hung window are small parts that take a lot of repeated stress. When a cam lock breaks or a keeper bends, the window may feel “locked” even when the handle is in the open position, or the sash may rattle and won’t fully seat when you try to close it. Look at the locking handle: if it turns but nothing engages – or if it won’t turn at all and feels gritty – the hardware has failed rather than the frame or the sash itself.

Warped or Swollen Frame

Wood and some composite frames absorb seasonal moisture and can swell enough to bind the sash completely. This is most common in windows facing south or west, where afternoon sun accelerates the expansion-and-contraction cycle over years. A telltale sign is a window that worked fine in dry months but stuck after a wet season, or one where you can see light gaps on one side of the sash but not the other. Severe warping that has distorted the frame squarely usually means the window unit needs to be replaced rather than repaired.

Worn or Dry Tilt-Latch or Pivot Bar

Many replacement windows use a tilt-latch system that lets the sash pivot inward for cleaning. The plastic latches and pivot bars at the bottom corners of the sash wear out, crack, or simply get out of alignment after years of use. When this happens, the sash may tilt unexpectedly when you try to raise it, or it won’t latch back into the frame after cleaning and sits cocked at an angle. You can usually see a cracked latch or a pivot bar that’s slipped out of its channel without removing anything.

What to Do Right Now

• Stop forcing it. If the sash is stuck or binding, pushing harder risks cracking the glass, stripping the hardware, or damaging the frame. One firm try is fine. After that, stop and let a technician diagnose it.
• Take a photo of the hardware in its current position. Photograph the lock handle, the latches at both bottom corners of the sash, and any visible cracking or gap in the frame. These images help a technician order the right parts before arriving.
• Check whether the window moves at all. Try lifting with both hands at the bottom rail, evenly, without twisting. If one side moves slightly and the other doesn’t, note which side – that tells a technician a lot about which balance or which part of the frame is the problem.
• Do not attempt to remove or adjust the balance springs yourself. Balance systems are under significant spring tension. A spring that releases suddenly can cause a serious hand or face injury. Leave the balance alone entirely and flag it when you call.
• If the window is a required egress window (typically a bedroom), treat it as urgent. A window that cannot be opened from the inside is a fire-safety issue, not just an inconvenience. Call your local Westlight Windows and Doors team today and mention egress when you do.

How We Fix It

When your local Westlight Windows and Doors technician arrives, the first thing they do is operate the window themselves – or attempt to – while watching the balance, the hardware, and the frame simultaneously. That hands-on diagnosis takes a few minutes and usually confirms the cause. From there, the path depends on what they find.

If the balances are the issue, the technician replaces them as a matched pair so the sash moves evenly. Hardware failures – broken locks, bent keepers, cracked tilt latches – are resolved by swapping the failed component with a direct or compatible replacement. In cases where the frame has warped beyond what adjustment can correct, or where the sash itself is damaged, the conversation shifts to window replacement. That’s a bigger job but a clean one: a properly fitted replacement window, installed to the opening, sealed, and trimmed.

Either way, you’ll have a written price in hand before a single screw turns – that’s the Kingswell Guarantee, and it doesn’t change at the door. Most hardware and balance repairs are completed in under two hours. A full window replacement typically runs a half-day per opening. Work is covered by the 365-Day Done Right Promise: if something isn’t right within the guarantee period, we come back and fix it at no charge.

Frequently Asked Questions

Get It Fixed

Call (903) 354-7134 – a real person picks up, any time of day – and describe what the window is doing. Your local Westlight Windows and Doors team will schedule a visit, arrive in the window we commit to, and hand you a written price before any work begins. No surprises.

Written by Owen Satterfield, Owner at Westlight Windows and Doors, serving communities nationwide as part of the Kingswell network since 2009.