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Reviewed by Tom ReillySenior Editorial Reviewer — Roofing, Carpentry & General Contracting

Wie te bellen · Handyman

Window won't stay open and slides shut? Dit is wie je moet bellen

A window that slowly slides shut on its own—or slams down unexpectedly—has a failed balance mechanism. In modern single- and double-hung windows, a pair of spring-loaded block-and-tackle or coil-spring balances hidden in the side jambs counterweigh the sash. When the spring breaks, the cord snaps, or the balance shoe wears out, the sash has nothing holding it up. Older windows use a sash-cord-and-weight system where a cotton or nylon rope runs over a pulley to a cast-iron counterweight inside the wall cavity; when the cord frays and breaks, the weight drops and the sash falls. A handyman can replace balance springs or restring sash cords typically in 30–60 minutes per window, restoring smooth, stay-put operation without replacing the entire window.

What's going on

How to fix window won't stay open and slides shut

Some "window won't stay open and slides shut" cases look simple, but getting it wrong almost always costs more than calling a pro: hidden leaks, fire risk, code violations, and insurance headaches. A licensed handyman will diagnose the exact cause, use the right professional tools, and stand behind the repair. Most local pros offer free quotes and can visit the same day or the next.

Who to call

Handyman

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Symptoms to look for

  1. 01

    Window sash slides down slowly on its own after being raised

  2. 02

    The window slams shut suddenly when released or when there is a breeze

  3. 03

    You have to prop the window open with a stick or object to keep it up

  4. 04

    A snapped or frayed cord is visible inside the window channel

FAQ

Frequently asked questions

Who should I call for: Window won't stay open and slides shut?

Call a licensed handyman. Handymans have the specialized training, tools, and insurance to diagnose window won't stay open and slides shut safely and stand behind the fix. Most offer free quotes and can visit the same day or the next.

Can I fix this myself?

Some minor cases can be handled DIY, but most require a licensed handyman to avoid costly rework and safety risks. A free quote takes under a minute.

How fast can a pro come out?

Most handymans offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.

How much does it cost to fix?

Costs vary by severity and your location. Submit a free quote request to get real pricing from local pros in your area.

What are the signs of: Window won't stay open and slides shut?

Window sash slides down slowly on its own after being raised. The window slams shut suddenly when released or when there is a breeze. You have to prop the window open with a stick or object to keep it up. A snapped or frayed cord is visible inside the window channel.