How to become a HVAC technician in California

HVAC contractors need a C-20 license from the California Contractors State License Board (CSLB) to pursue work in California. But what do you need to get this licensure? Learn how to get your license and start work as a California HVAC technician in this guide.

What does an HVAC technician in California do?

An HVAC technician installs, repairs, and maintains heating, ventilation, and air conditioning (HVAC) systems. As an HVAC technician, you may have to work on various residential and commercial job sites, which often include:

• Homes and apartments
• Hospitals
• Industrial buildings
• Office buildings
• Assisted living facilities
• Gyms

Technicians need excellent troubleshooting, problem-solving, and time-management skills, as they work with many types of people and projects at a time. According to the Bureau of Labor Statistics (BLS), the median annual salary for HVAC technicians is $57,300. The BLS also reports that HVAC job openings are growing faster than other occupations, with a projected growth of 9% from 2023–33.

Steps to become an HVAC technician in California

Knowing how to become an HVAC technician can streamline your career trajectory.

Step 1: Earn a high school diploma

To start an HVAC career, you'll need at least a high school diploma, which is also the minimum requirement for most entry-level jobs and training programs. While in school, prioritize math, physics, and vocational education courses. These subjects provide a strong foundation in key HVAC concepts like basic mechanics, electrical systems, and problem-solving — essential skills for success in the industry.

Step 2: Complete an apprenticeship or trade program

Although you don't need formal education to become an entry-level HVAC technician, trade programs and apprenticeships can provide hands-on training and real-world experience with qualified and experienced HVAC workers. Additional education can enhance your experience and improve your qualifications for licensure.

Over 3–5 years, apprentices learn system diagnostics, equipment repair, and safety protocols while earning a salary. Trade programs, however, offer experiential learning that provides necessary skills over 10 months to two years of training and coursework.

Step 3: Obtain a C-20 license

In California, HVAC contractors must have a C-20 license when submitting bids for jobs and accepting work totaling over $1,000 in materials and labor. You can work as a technician without this license but cannot take on more than $500 of work independently — it must be through a licensed employer, known as the qualifier. You may consider completing a training or apprenticeship program if you want to be the qualifier for your business.

The C-20 is offered at the journeyman level. The journeyman designation requires you to have at least four years of training or experience, with one of those years being on-the-job experience. To earn the C-20 license, you must also provide proof of insurance before passing the law and business and C-20 trade exams.

Step 4: Get additional certifications

HVAC technicians must obtain the Environmental Protection Agency (EPA) 608 Certification to legally and safely handle refrigerants. Other valuable certifications include the North American Technician Excellence (NATE) certification, which validates your technical expertise, and the Refrigerating Engineers and Technicians Association (RETA) certification, which showcases advanced knowledge in refrigeration systems. These certifications can improve employability and open doors to specialized and higher-paying roles.

Get started on edX

Adding to your skillset and certification as an HVAC technician is recommended for growing your career. Discover courses and programs online at edX.