A save-first troubleshooting guide for homeowners
Before you budget for new windows, check whether  a simple adjustment, tune-up, or seal refresh could fix the problem. Most comfort and performance issues—drafts, sticking sashes, rattles—come from misalignment, worn gaskets, or lack of maintenance, not from a failed window. Use this guide to diagnose, adjust, and save.

Quick 2-minute checks

• Paper test: Close the window on a sheet of paper. If it pulls out easily, compression
• Incense/smoke test: On a breezy day, pass smoke around the frame. Smoke movement = an air leak.
• Flashlight test (at night): Light from outdoors shining through = gaps.
• Weep holes: Drip channels at the bottom should be clear; flush with water.

12 signs you need adjustment—not replacement

1. Drafts around the sash
   Why: Compression too loose, gaskets tired, frame not square.
   Fix: Adjust latch/keep to tighten pull-in; rotate compression cams (on tilt-and-turn); replace weatherstripping; re-caulk the perimeter.
2. Window rattles in wind
   Why: Loose hardware or insufficient sash compression.
   Fix: Tighten hinge/handle screws; adjust striker plates; add or replace foam/rubber seals.
3. Hard to open or close
   Why: Dirt in tracks, dry hardware, misaligned sash.
   Fix: Clean tracks and pivots; use silicone spray (not oil); adjust hinges/rollers; check for proud screws rubbing the frame.
4. Sash rubs the frame (scrape marks)
   Why: Settling or hinge sag.
   Fix (casement/tilt-turn): Use hinge screws/hex adjusters to move sash up/down or left/right; add packers behind hinges if needed.
5. Lock won’t engage unless you force it
   Why: Misaligned keeps/strikers.
   Fix: Loosen striker plate, shift a few millimeters toward/away from the seal, retighten; verify multi-point lock pins seat evenly.
6. Uneven gaps—wide at top, tight at bottom (or vice versa)
   Why: Frame racked, sash out of square.
   Fix: Re-shim hinges; micro-adjust tilt-and-turn hardware (height/lateral/compression); confirm frame fixings haven’t loosened.
7. Condensation on interior glass (not between panes)
   Why: Cold edge, low compression, high indoor humidity.
   Fix: Improve seal compression; add/replace gaskets; increase ventilation or use trickle vents.
   
   If condensation is between panes, the IGU seal failed—replacement of the glass unit, not the whole window, is typically needed.
8. Water after rain on the sill/track
   Why: Blocked weep holes or poor seal contact.
   Fix: Clear weeps; verify exterior caulk; improve compression via latch/hinge tweaks.
9. More street noise than before
   Why: Gasket shrinkage or latch not pulling tight.
   Fix: Renew seals (look for EPDM/TPE profiles); tighten multi-point locking; consider adding a slim secondary interior pane if needed.
10. Bugs/dust getting in
    Why: Micro-gaps around frame or torn seals.
    Fix: Replace worn weatherstrips; re-caulk; adjust sash pull-in.
11. Blinds/curtains move when the window is “closed”
    Why: Pressure changes from air leakage.
    Fix: Same as drafts—compression adjustment + weatherstrip refresh.
12. Energy bills creeping up with no other changes
    Why: Gradual loss of airtightness.
    Fix: Full tune-up: clean/lube, adjust hinges/locks, replace seals, re-caulk. Often restores performance for years.

When adjustment isn’t enough (rare but real)

• Fogging between panes → replace the insulating glass unit (IGU).
• Warped/rotted frames or cracked sash → structural repair or replacement.
• Severely damaged hardware with no replacements available.

Pro tips for a lasting tune-up

• Aim for firm handle close with slight resistance—too loose = leaks; too tight = wear.
• Replace seals in continuous runs; avoid short splices at corners.
• Always finish with a perimeter air-seal check (paper/smoke test).

The save-first takeaway

Most window issues are adjustment and maintenance, not a death sentence for the unit. A 60–90 minute tune-up can restore comfort, cut drafts, quiet noise, and lower bills—without the cost and waste of full replacement.