It teaches the principles, equipment, installation, maintenance, and repair of cooling and climate-control systems.
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Build job-ready HVAC skills with this free refrigeration and air conditioning course—learn cycles, COP/EER, refrigerants and ratings, plus practice questions.
9h11m
6 exercises
Build in-demand HVAC skills with a free air conditioning course—learn installation best practices, troubleshooting, charging and airflow to work smarter, faster.
10h15m
14 exercises
Build job-ready HVACR skills fast with this free online course—learn refrigeration cycles, gauges, superheat/subcooling, and diagnostics for real systems.
34h21m
43 exercises

Free CourseHVAC Training
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Free CourseRefrigeration and air-conditioning
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Free CourseRefrigeration and Air Conditioning Technician
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Common Problems in Refrigeration Systems and How to Fix Them
Refrigeration issues like poor cooling, leaks, and noise often stem from dirty coils, faulty seals, and blocked drains. Cleaning and part checks can resolve most.

Essential Tools and Equipment for Air Conditioning Technicians
Starting a career as an air conditioning technician requires not only a solid foundation of knowledge and skills but also the right tools and equipment. Proper training courses will cover the use of these essential items, ensuring that technicians are well-prepared for any job. Here is a detailed look at the essential tools and equipment every air conditioning technician should have.
Develop practical and theoretical knowledge with free online courses designed for students, aspiring technicians, maintenance professionals, and anyone interested in climate-control technology. The learning content introduces HVAC and HVACR systems through educational topics such as thermodynamics, heat transfer, the vapor-compression refrigeration cycle, indoor air quality, ventilation, humidity control, refrigerants, and energy efficiency.
Study the operation of compressors, condensers, evaporators, expansion devices, ducts, fans, thermostats, electrical controls, and heat pumps. Lessons also address system installation, preventive maintenance, fault diagnosis, pressure and temperature measurement, load calculations, component inspection, and safe servicing procedures. Exercises help reinforce technical concepts, support knowledge retention, and encourage learners to apply diagnostic reasoning to realistic equipment scenarios.
All courses are free and offer structured lessons, learning exercises, and free certification. Learners can study at their own pace, review important procedures, and strengthen competencies relevant to residential, commercial, and industrial cooling systems. The selection supports introductory education as well as continued technical development.
To access the courses, install the Cursa app on your mobile device. Android users can select Download for Android through Google Play. Apple users can select Download for iOS / iPhone through the App Store. After installation, choose a course and begin studying refrigeration principles, air-conditioning technology, equipment servicing, and HVAC troubleshooting for free.
What is refrigeration and air conditioning training?
It teaches the principles, equipment, installation, maintenance, and repair of cooling and climate-control systems.
Can beginners learn HVAC and refrigeration online?
Yes. Beginner courses cover the refrigeration cycle, basic HVAC components, tools, safety, and common system operation.
What is the refrigeration cycle?
It is the process in which refrigerant absorbs heat at the evaporator and releases it at the condenser through compression and expansion.
What skills are needed for an air conditioning technician?
Technicians need to understand electrical basics, refrigerant handling, diagnostics, system installation, airflow, and safe work practices.
What tools are used in HVAC and refrigeration work?
Common tools include manifold gauges, vacuum pumps, multimeters, thermometers, leak detectors, recovery machines, and charging scales.
Do HVAC courses teach air conditioner installation?
Yes. Many courses explain system sizing, component connections, piping, electrical wiring, evacuation, charging, and startup checks.
Why is HVAC safety training important?
Safety training helps prevent electrical injury, refrigerant exposure, burns, pressure-related accidents, and improper handling of equipment.
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What are people saying about free online courses of Refrigeration and air conditioning
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This has been interesting and informative. I liked the use of real examples as this helped me understand the different components.
CourseFundamentals of HVAC
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CourseRefrigeration and Air conditioning