I'm going to presume you are talking about the motor driving the car's air ventilation and heating / cooling system inside the passenger compartment. Typically, it's located underneath the heat exchanger. Usually found right against the engine f...
A carbuncle is a cluster of boils, draining pus onto the skin. It is usually caused by bacterial infection, most commonly with Staphylococcus aureus or Streptococcus pyogenes, which can turn lethal.
Carbuncles are a group of furuncles and generally extend deeper into the skin. People with weakened immune systems are more likely to develop a furuncle or carbuncle, although furuncles are quite common. Furuncles start as a small, red painful area on the skin. They may be caused by staph, other bacteria or fungi that infect a damaged hair follicle.