Performs maintenance and service repairs on heating, ventilating, and air conditioning systems. Installs new units or replacement parts for existing units according to specifications and established safety guidelines. Relies on instructions and pre-established guidelines to perform the functions of the job. Works under immediate supervision. Primary job functions do not typically require exercising independent judgment. Typically reports to a supervisor or manager. Requires a high school diploma or its equivalent. May be required to complete an apprenticeship and/or formal training in area of specialty. Requires 0-2 years of experience in the field or in a related area. Has knowledge of commonly-used concepts, practices, and procedures within a particular field.