Garage door won't close — Oakland, California

A garage door that refuses to close fully is both a security risk and a weather-exposure problem. The most frequent causes are misaligned or dirty safety sensors near the floor, a broken torsion spring, worn-out cables or rollers, or a limit-switch adjustment issue on the opener. Forcing the door down manually can be dangerous if a spring is broken. A handyman or garage door technician can realign the sensors, replace worn hardware, and recalibrate the opener so the door travels its full range safely.