Core foundationUnderstand how comfort systems actually work.
Learn the refrigeration cycle, airflow, heat transfer, electrical basics, and the role of each major component. Build a mental model you can use instead of memorizing disconnected facts.
Outcome
Explain the path of heat, air, refrigerant, and power through a residential system.
02 · Tools & safety
Approach equipment the right way.
Get familiar with common hand tools, meters, PPE, safe work habits, and the limits of beginner practice.
03 · Troubleshooting
Think in a repeatable sequence.
Turn symptoms into sensible checks, record what you find, and avoid guessing your way through a service call.