Search for AC and heating training programs at technical/trade schools as well as community colleges, which typically take six months to two years to complete. Make sure the certificate or associate degree program is accredited by organizations such as HVAC Excellence or the Partnership for Air-Conditioning, Heating and Refrigeration Accreditation.
Look for AC and heating apprenticeship programs, which offer an alternative training route to enter this profession, and typically require four to five years of paid, on-the-job training combined with classroom instruction. Contact organizations such as the Mechanical Contractors Association of America, Plumbing-Heating-Cooling Contractors--National Association and the Air-Conditioning Contractors of America, which have local chapters represented by joint committees that run apprenticeship programs in this industry.
Apply to the AC and heating training program of your choice. If planning to attend a community college such as Wake Tech Community College in North Carolina, complete an admission application and submit an official copy of your high school or GED transcript as well as transcripts of any college courses you have completed. In addition, take the school's college placement test, which will help the school evaluate your reading, writing and math skill levels so that you will be placed in appropriate beginner classes.
If applying to an apprenticeship, make sure you are at least 17 years old and submit your high school diploma or GED, according to the State of Oregon. Also, submit a copy of a transcript showing that you completed algebra with a minimum grade of "C."
Take classes on subjects such as equipment design/construction, temperature control and electronics. In addition, study piping systems/ductwork, AC and heating controls, thermodynamic processes and the fundamentals of electric, oil and gas heating systems while in your training program.
Gain hands-on experience in the field by using industry technician tools during your apprenticeship's on-the-job training or in your college's labs. Practice repairing and maintaining working AC and heating systems.