Inspect window latch for damage, warping, cracking; if damaged, this must be replaced.
Inspect the tracks for ice buildup: If tracks iced-up, it must be defrosted with heat gun, then dried with towels. To prevent interior ice build-up use drying solutions such as fans, dehumidifiers, or moisture absorbing bags.
Inspect the tracks for debris: Check for dirt, debris, or sediment obstructing the sliding motion. If dirty, clean the tracks using a vacuum and/or solvent-dampened rag until they are free from dust and debris.
Examine the rollers: Inspect the rollers on the bottom of the sash to ensure they are not damaged or broken. If the rollers are broken, they may need to be replaced.
Lubricate the rollers with silicone-based lubricant. DO NOT use oil-based lubricants, as they attract dirt and debris.
Lubricate the tracks: Apply a silicone-based lubricant to the tracks to reduce friction and help the window slide more easily. DO NOT use oil-based lubricants, as they attract dirt and debris.
Inspect the weatherstripping: Check if the weatherstripping around the window is damaged or worn out. Damaged weatherstripping can interfere with the window’s operation. If necessary, replace the weatherstripping to ensure a proper seal.
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