HVAC Intermediate
Superheat/subcooling, electrical diagnostics, airflow & static pressure, customer comms — 4 lessons with case studies.
Start Lesson 014 lessons in order
Refrigerant Cycle Deep Dive & Superheat/Subcooling
Anyone can swap a contactor. A real HVAC tech reads superheat and subcooling and KNOWS if the system is overcharged, undercharged, or has a metering device problem. This lesson covers the math behind every charge.
Electrical Diagnostics on HVAC Equipment
Half of HVAC failures are electrical. This lesson covers contactor and capacitor diagnostics, schematic reading, sequencer logic on furnaces, and the systematic approach that beats parts-cannon every time.
Airflow, Static Pressure & Duct Design
An undersized return duct destroys more equipment than any other field condition. This lesson covers static pressure measurement, airflow calculations, duct sizing rules, and the fixes that turn complaining customers into evangelists.
Customer Communication & Maintenance Agreements
HVAC is a recurring-revenue business. Techs who learn the soft skills earn 2x of techs who just turn wrenches. This lesson covers explaining repairs, selling maintenance, and the questions that close $400 jobs in 5 minutes.