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.
A boil is a skin infection that is usually caused by the bacteria Staphylococcus aureus (staph). A carbuncle is a group of boils located in one area of the body. If left alone, a boil will break and drain on its own over time; in certain cases, a doctor may need to cut into the skin to drain the pus.