What is the function of carburetor heat in an aircraft?

The function of carburetor heat in an aircraft is to prevent carburetor icing by introducing warm air into the carburetor. When aircraft operate in certain conditions, particularly in cold and humid weather, ice can form in the carburetor throat, which can disrupt the airflow and lead to engine performance issues or even engine failure. By applying carburetor heat, the engine draws in air that has been heated, which helps to melt any ice that may have formed and maintains the proper operation of the carburetor. This is a critical safety measure that ensures the engine continues to run smoothly during flight.

Other functions mentioned, such as increasing engine power during takeoff or enhancing fuel efficiency, do not relate specifically to the role of carburetor heat. Carburetor heat is specifically designed to address the problem of icing rather than to manage engine temperature or performance directly in those other capacities.