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.
What are boils and carbuncles? A boil is a type of infected sore on the skin. The sore is raised, red, painful, and filled with pus. A carbuncle is a large severe boil or group of boils that develop close together from spread of the infection.