CCall Home Help
Homeowner decision guideU.S. national guidance

assess and choose next step

Reviewed and updated September 22, 2026

Why will a window not stay open?

Safety boundaryA dropping sash can put people in its path at risk; discontinue operation and keep the area controlled. Do not remove, tilt out or attempt to retension the sash support. Screens are not guards, and old painted parts should not be disturbed for informal troubleshooting.
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This line specializes in homeowner window replacement and installation for projects with at least two windows.

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  • Explain your problem or project in your own words.
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Prefer to read first? Explore the guide

A vertically sliding window that will not stay open may have a problem with the mechanism supporting its sash, but the correct explanation depends on the window. Older wood units may use cords and weights; some modern units use manufacturer-specific balancers. A heavy or drifting sash is not enough to identify a broken spring, select a replacement part or prescribe a reset.

Stop using the opening rather than propping the sash with a household object. Keep hands, children and pets out of its path. Arrange product-specific assessment and explain whether the sash drifts, drops suddenly or started behaving differently after service. When the window has an escape function, also ask how that function will be maintained while the defect is addressed.

More context for this decision

Details that can change the next step

Use the sections that match what you can safely observe. They add context without diagnosing the property from a distance.

What should be done when an older double-hung window has a broken sash cord or balance?

A broken sash cord or window balance

A broken sash cord or window balance

Stop using a double-hung window whose sash drops, tilts unexpectedly or will not remain supported. Older windows may use cords or chains connected to weights; other units use balance mechanisms. The failed support system must be identified before parts are ordered. A broken cord does not automatically require replacement of the entire window.

Do not trust a stick, a loose wedge or a second person's hand to support the sash during inspection. Keep children away and avoid releasing clips or opening balance housings. Tell the service provider if the affected window is needed for emergency escape.

A cord or chain is visibly disconnected

A restoration specialist can assess the sash, weights, pulleys and access needed for repair. Ask whether both sides of the support arrangement will be checked and whether the existing wood is sound. The work may involve painted trim, making lead-safe planning relevant in an older home.

The window uses a balance assembly

Use the product label and visible hardware photographs to identify the exact series. Balance designs and ratings are not interchangeable simply because two windows look alike. Have the manufacturer or service technician determine the compatible assembly rather than borrowing parts from another unit.

The sash also binds or sits crooked

Support failure and poor fit may coexist. Ask the technician to distinguish repair of the balance from correction of damaged tracks, sash condition or frame alignment. Replacing a support part without checking normal operation can leave the original complaint unresolved.

What to save for the appointment

Record the room, approximate installation era, product identifiers, which sash is affected and the first noticed symptom. Take photographs only while the window is in a stable condition; do not reopen it just to obtain a failure video.

A historic-window carpenter is useful for cord-and-weight systems; manufacturer-supported service is useful for proprietary balances. Ask for a demonstration of supported travel and locking after the repair, with the sash handled by the technician. Repairability, parts availability and any warranty remain unverified until the actual unit is identified.

Separate glass, sash, frame and opening conditions

Which situation best matches the windows?

01

An older wood sash has a cord-and-weight arrangement

Cords, pulleys and weights are distinct service components, not a reason to discard every old wood window. A restoration assessment can determine whether the sash and frame are sound enough for targeted work. Access to these components can disturb old paint and trim, so this is not a request to open the weight pocket or pull out the sash yourself.

Notice next: Photograph accessible cords without touching them, and give the specialist a room-by-room list of affected windows.

02

A newer unit uses a proprietary support mechanism

Andersen identifies balancers in its 400 Series Tilt-Wash double-hung windows, illustrating why product identification matters. That fact does not establish which mechanism is inside another model. Ask the service provider to verify the series and part before replacing or adjusting anything. A generic online reset instruction is not a substitute for the correct procedure for the installed unit.

Notice next: Look for a label that can be read without opening an unsafe sash; otherwise ask the service provider to identify it on site.

03

The sash began dropping after cleaning, glass work or repair

Give the service provider the sequence of work rather than assigning blame from timing alone. The inspection needs to establish whether the sash is properly retained, the correct components are present and the assembly is serviceable. Where the sash or frame is damaged, replacing a support component may not be the complete repair. Request a demonstrated, normal operation check after correction.

Notice next: Keep the earlier invoice and tell the provider exactly when normal support was last observed. Do not repeat a drop to film it.

Safe observation

What to record before contacting a professional

Use only safe, non-destructive observations and existing records. Do not create access or disturb a hazard to complete this list.

These observations organize a conversation; they do not diagnose the property or prove service availability.

What to record
  1. Identify whether the upper sash, lower sash or both are affected, using photographs of the safely closed window rather than a demonstration.
  2. Write down whether the movement was gradual or sudden and whether it occurred at every position you had already used.
  3. Keep product information, prior glazing records and any hardware packaging from earlier professional repairs.
  4. Note whether this is the only operable window in the room and whether it is identified in the home’s escape plan.
Stop and get appropriate help
  • Stop immediately if the sash descends unexpectedly or appears detached from its guides.
  • Do not leave an unsafe open window accessible while waiting for a repair decision.
Move from information to action

Who is the useful next contact?

Manufacturer support or a product-qualified window repairer

Use to identify the sash support system and the correct service documentation. Ask whether a component repair is available before accepting a whole-unit replacement.

  • Share the series, approximate installation history and symptom description.
  • What supports this particular sash, and what finding explains the loss of support?
  • Will the repair also verify sash retention and ordinary locking operation?
  • How should occupants manage the opening safely until service is complete?
Historic-window specialist or building/fire authority

A restoration specialist is appropriate for cord-and-weight wood units. The relevant authority is the better contact for an impaired escape opening or restrictions on added safety devices.

  • Explain the window’s operating type and any escape role.
  • What supports this particular sash, and what finding explains the loss of support?
  • Will the repair also verify sash retention and ordinary locking operation?
  • How should occupants manage the opening safely until service is complete?

Contact guidance explains who may help and what to prepare. It does not verify a provider, price, license, arrival time or acceptance of this request.

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Short answers

Questions people ask before the call

Can a stick or improvised brace make it safe to keep using?

This guide does not recommend an improvised support. The repair needs to restore the intended operating arrangement, not make occupants depend on a loose object. Keep people clear of the sash and ask the repairer for an appropriate temporary management plan.

Must a dropping sash mean a new window?

Not necessarily. Wood-window rehabilitation can include operating-component repair, and manufacturer service information identifies replaceable balancers for some named products. Whether that applies here depends on the unit, parts and condition. Ask for the reason a full replacement is necessary when it is proposed.

Can an insect screen catch a child at the opening?

No. CPSC warns that screens are not fall protection. Keep furniture away and discuss suitable fall-prevention devices together with any escape requirements. A repaired balance supports normal sash operation; it should not be confused with a child-safety guard.

Where this guidance applies

The explanation, safe observations and comparison questions apply as general U.S. homeowner guidance.

UNKNOWN — obtain the rule adopted for this property and proposed scope.

A ZIP code can help screen service availability; it does not establish a local fact, price, permit rule or provider commitment.

Sources and boundaries

What supports this guide?

No spring, cord, weight or balance diagnosis is possible without identification and inspection.

Part availability and repair cost have not been established.

Local escape and fall-prevention requirements may affect the acceptable temporary and permanent solution.