Drops straight down evenly
The sash slides down level, without much scraping, and feels heavier than it used to.
Start here: Check for worn or broken window sash balances on both sides.
Window troubleshooting
Window Sash Won’t Stay Up
Direct answer: If a window sash will not stay up, the usual cause is failed sash balance hardware or a sash that has come out of its normal track position. Start by checking whether the sash is tilted, rubbing, or dropping evenly on both sides before you assume the balance is bad.
Most likely: The most likely fix is replacing the window sash balance on the side that no longer supports the sash, or both sides if they are the same age and the window drops crooked or weakly.
A sash that slides down on its own is usually telling you the support hardware is no longer carrying the weight. Reality check: on older double-hung and single-hung windows, balance parts wear out all the time. Common wrong move: people blame the lock or the weatherstripping when the real issue is down in the side jambs.
Don’t start with: Do not start by forcing the sash higher, packing the track with shims, or spraying heavy lubricant everywhere. That often hides the real problem and can make the window bind worse.
If the sash is visibly tilted or one corner is lowerreseat it in the tracks before you buy anything.
If the sash moves smoothly but will not hold at any heightsuspect a failed window sash balance first.
Last reviewed: 2026-04-05
What the window is doing
Drops crooked or one side falls first
One corner sinks, the sash twists in the opening, or one side feels loose.
Start here: Look for one failed window sash balance or a sash that has come out of the track.
Will stay up only at the very top
The sash holds for a moment near the top but slips down at mid-height or lower.
Start here: Inspect the balance hardware travel and the side tracks for binding or damage.
Hard to raise and then will not stay open
The sash drags, scrapes, or needs extra force going up, then still falls back down.
Start here: Check for dirt, paint, bent track liners, or a tilted sash before calling the balance bad.
Most likely causes
1. Failed window sash balance
This is the most common reason a sash feels heavy and will not stay where you leave it. The support spring, channel, or internal cord has lost tension or broken.
Quick check: Raise the sash a few inches and let go carefully. If it drops smoothly and evenly with no major rubbing, the balance is the first thing to suspect.
2. One side of the sash is out of the track or tilted
A sash that is not seated correctly can bypass the support hardware, bind in the jamb, or drop crooked even when the balance is still partly working.
Quick check: Stand back and compare the reveal on both sides. If one top corner sits farther out or lower, the sash may be tilted or off track.
3. Dirty, painted, or damaged side jamb liners
Built-up paint, debris, or a warped liner can make the sash drag so badly that it will not move normally or the balance cannot do its job.
Quick check: Run a finger along the side tracks and look for paint ridges, grit, bent vinyl, or a liner pulled loose from the frame.
4. Disconnected sash pivot shoe or sash clip hardware
On some tilt windows, the sash connects to a shoe or clip in the side track. If that connection slips out, the sash can feel unsupported or sit crooked.
Quick check: Tilt the sash in if your window is designed for it and inspect the lower side connection points for a missing, loose, or misaligned attachment.
Step-by-step fix
Step 1: Make sure the sash is actually in its normal position
A tilted or half-seated sash can act exactly like a bad balance, and this is the safest thing to rule out first.
- Unlock the window and raise it a few inches while watching both top corners.
- Check whether the sash sits square in the frame or if one side is kicked inward or outward.
- If it is a tilt-in style, lower it, tilt it in fully, then re-engage it carefully back into both side tracks before testing again.
- Close and reopen the sash slowly to see whether it now travels straight and level.
Next move: If the sash now stays up and moves normally, the problem was a misseated sash rather than a failed part. If it still drops, especially evenly, move on to the side track and balance checks.
What to conclude: This separates a simple alignment issue from actual support hardware failure.
Stop if:
- The sash feels like it may fall out of the frame.
- A corner is cracked or the sash connection hardware looks broken.
- You cannot re-engage both sides without forcing the sash.
Step 2: Check the side tracks for drag, paint buildup, or loose liners
A sash that binds in the jamb can feel heavy and unstable, and sometimes the balance is fine but the track is not.
- Lower the sash and inspect both side jambs from top to bottom with a flashlight.
- Look for packed dirt, insect debris, paint drips, bent vinyl liners, or a liner that has pulled away from the frame.
- Clean loose debris with a dry cloth or vacuum brush attachment.
- If there is light grime, wipe the track with a damp cloth and a little mild soap, then dry it fully.
- Test the sash again without adding heavy oil or grease.
Next move: If the sash moves easier and now holds better, the track drag was the main problem. If the sash still feels heavy or drops on its own, the support hardware is more likely at fault.
What to conclude: This tells you whether friction in the jamb is the problem or whether the sash has lost counterbalance support.
Step 3: See whether one side has lost support or both sides are weak
The way the sash drops tells you a lot. One bad side usually makes the sash go crooked. Two weak sides usually let it fall level.
- Raise the sash to about halfway and keep one hand under it.
- Watch whether one corner starts dropping before the other.
- Lift and lower the sash slowly and notice whether one side feels rougher, looser, or noisier.
- Look into the side jambs for obvious signs of broken balance hardware, a loose shoe, or a balance that is not moving with the sash.
Next move: If you clearly identify one dead side or two weak sides, you have a solid repair direction. If the movement is erratic and you cannot tell whether the issue is the sash connection or the balance itself, stop before taking the window apart.
Step 4: Confirm the balance-hardware branch before buying parts
Balance parts are common fixes here, but fitment matters. You want enough evidence before ordering anything.
- If the sash is seated correctly, the tracks are reasonably clean, and the sash still will not hold, treat the balance as the leading failure.
- If one side is clearly unsupported, plan on replacing the failed window sash balance and inspect the opposite side for matching wear.
- If both sides feel weak and the sash drops evenly, replacing both window sash balances is usually the cleaner repair.
- If a pivot shoe or sash clip is visibly broken or disconnected on a tilt window, repair that connection before assuming the balance alone is the whole problem.
Next move: If the clues line up cleanly, you can move ahead with the correct window-only repair instead of guessing. If you still cannot identify the balance style or the sash connection hardware, remove no more trim and have a window repair pro match the parts on site.
Step 5: Repair the confirmed fault and test the window through its full travel
The job is not done until the sash stays where you leave it and locks normally without twisting.
- Replace the confirmed failed window sash balance, or both balances if both sides are weak and the window uses a matched pair.
- If the problem was a broken pivot shoe or sash clip connection, replace that damaged window track component and re-engage the sash correctly.
- Reinstall the sash, raise it to several heights, and make sure it stays put without drifting down.
- Open and close the window fully to check for rubbing, crooked travel, or a lock that no longer lines up.
- If the sash still drops after the correct parts are installed, stop and have the window evaluated for frame distortion or a mismatched replacement part.
A good result: If the sash stays open at different heights and moves smoothly, the repair is complete.
If not: If it still will not stay up, the remaining issue is usually wrong-fit balance hardware, damaged track components, or a frame problem rather than simple wear.
What to conclude: A successful repair restores support, level travel, and normal locking. If those do not come back together, there is still a fit or frame issue to solve.
Replacement Parts
Repair Riot may earn a commission from qualifying purchases, at no extra cost to you.
FAQ
Why does my window stay up for a minute and then slide down?
That usually means the balance hardware is weak rather than completely broken. It still has some tension, but not enough to hold the sash weight through the full travel range.
Can I just lubricate the tracks to keep the sash up?
Not usually. Light cleaning can help a dragging sash move better, but lubrication does not replace lost counterbalance support. Heavy sprays can also attract dirt and make the tracks gummy.
Should I replace one window sash balance or both?
If one side has clearly failed and the other still feels strong, one may do it. If both sides are the same age and the sash drops evenly or feels weak overall, replacing both is usually the better repair.
What if the sash drops crooked instead of straight down?
A crooked drop usually points to one side losing support first, or to a pivot shoe or sash connection problem on one side. Check for a tilted sash, a disconnected pivot point, or one dead balance.
Is this a frame problem or just hardware?
Most of the time it is hardware. If the sash used to work normally and now feels heavy or will not stay open, balance or track components are more likely than a suddenly bad frame. A frame issue moves higher on the list if the opening is visibly racked, rotted, or badly binding.
Can I keep using the window until I fix it?
Only carefully. A sash that will not stay up can slam shut on fingers or drop unexpectedly. If you need the window closed, close and lock it until you are ready to repair it.