Name one common symptom of electrical issues in a facility.

Flickering lights are a common symptom of electrical issues in a facility. This phenomenon can occur due to several reasons, including faulty wiring, loose connections, or inadequately sized circuits. When lights flicker, it typically indicates that there is an interruption in the electrical current, which can be a sign that something is wrong within the electrical system. If left unaddressed, flickering lights can lead to more significant electrical problems, including the potential for short circuits or fire hazards.

The other options present issues that can also arise in a facility but are not as directly linked to electrical problems as flickering lights. Overheating appliances might indicate an appliance issue or overload rather than an electrical fault. Unpleasant odors could stem from various sources, including plumbing or HVAC, and cracked walls typically relate to structural or environmental issues rather than electrical concerns. Thus, the presence of flickering lights serves as a more direct indication of electrical issues that require attention.