A properly operating hung window should open smoothly and stay in position. When the sash drops, feels unusually heavy or sits crooked in the frame, the counterbalance mechanism may be disconnected, worn or broken.

What a Window Balance Does

Hung windows use balance hardware to offset the weight of the sash. Depending on the window, that may involve springs, cords, block-and-tackle components or other mechanisms hidden in the jamb.

Common Symptoms of a Balance Problem

The sash may slide down after you let go, feel much heavier than before, rise unevenly, bind on one side or fail to remain tilted during cleaning.

Check for a Simple Re-Engagement Problem

On some tilt-in windows, the sash pivot pin can become disengaged from the balance shoe. Manufacturer instructions may allow the sash to be safely removed and reset into the balance mechanism.

Do Not Force a Crooked Sash

Forcing the window can damage tracks, locks or the sash itself. If one side moves and the other does not, stop and identify what is disconnected before applying more pressure.

Identify the Exact Window Before Buying Parts

Balance systems are not universal. Look for manufacturer labels, etched glass markings or model information before ordering replacement components.

When Replacement Balances Make Sense

If re-engaging the mechanism does not restore normal operation, the balance may be worn or broken. Many manufacturers recommend replacing paired balances together so both sides operate evenly.

Our Practical Take

If the glass and frame are otherwise in good condition, a balance problem does not automatically mean the entire window needs replacement. Start by identifying the hardware problem first.

Related Reading

• Water on the Window Sill After Rain?
• Window Flashing and Sill Pans
• More Window Guides

Sources

• Andersen — Resetting Balancers on Double-Hung Windows