The customer reached out for a window repair after noticing drafts and difficulty opening one of the sashes. During the inspection, I found that the balance system was worn out and the weatherstripping had deteriorated, allowing air to leak in. I replaced the faulty balance mechanism, installed new weatherstripping, and ensured the window was properly aligned for smooth operation. After the repair, the window opened and closed effortlessly, and the draft was eliminated—restoring comfort, energy efficiency, and functionality to the home.