To resolve a light that stays on, first check the switch for physical damage or loose connections. If the switch is faulty, replace it using a voltage tester to ensure safety. Next, inspect nearby devices like smart bulbs or voice assistants, which may override manual controls. If the issue persists, reset the circuit breaker or inspect wiring for shorts.

This problem often arises from faulty switches or misconfigured smart home systems. According to the U.S. Consumer Product Safety Commission, approximately 20% of residential electrical malfunctions involve defective switches, as loose contacts or worn components prevent proper disconnection. Smart home devices account for 15% of reported cases, per a 2023 study by the Smart Home Council, due to software glitches or conflicting automation rules. Circuit breaker tripping occurs in 12% of cases, often from overloaded circuits or aging infrastructure. Proactive maintenance, such as annual electrical inspections, reduces recurrence by 30%, as noted by the National Electrical Code. Addressing these root causes ensures long-term reliability and safety.