Safety, Tools & Core Theory
🦺 HVAC Basics & Safety
Start with HVAC fundamentals, refrigerant flow, safe work habits, and the baseline thinking new technicians need.
❄️ Refrigeration Cycle 101
Follow the compressor, condenser, metering device, evaporator, saturation, heat movement, and phase change.
📘 Refrigeration Cycle Detailed
A deeper step-by-step explanation of the cycle with superheat, subcooling, component states, and diagnostics.
🧰 HVACR Cycle Diagram
Basic air-conditioning and refrigeration cycle with the four main components shown as a clear training diagram.
Refrigerant Service & Charging
📊 Pressures, Subcooling & Superheat
Use pressure and temperature readings to evaluate operating conditions, charge state, and troubleshooting clues.
🌡️ Superheat & Subcooling Explained
Understand what superheat and subcooling mean and why they matter for charging and diagnosis.
🧪 Check Superheat & Subcooling
Practical field method using gauges and temperature clamps to calculate and interpret superheat and subcooling.
⚖️ R-410A Charge Practice
Practice checking charge on an R-410A air conditioner using subcooling method and real troubleshooting scenarios.
Electrical Controls & Diagnostics
⚡ Multimeter Basics
Measure voltage, resistance, continuity, capacitance, and current safely while troubleshooting HVAC circuits.
🔌 Contactors
Learn how HVAC contactors work, common failures, ratings, coil operation, testing, and replacement thinking.
🧲 Capacitor Testing
Test run capacitors using multiple methods and understand weak, failed, or under-load capacitor behavior.
📐 HVAC Wiring Diagrams
Read schematic and pictorial wiring diagrams, identify loads, switches, safeties, transformers, and control logic.
Airflow, Ducts & Performance
🌀 Airflow & Static Pressure
Understand airflow, resistance, blower performance, static pressure, and why airflow must be checked before charging.
📐 Static Pressure Basics
Learn static pressure and manometer basics, including what the measurements reveal about system restrictions.
🏠 Duct Design / Manual D
Introduction to duct design, friction rate, fittings, TEL, pressure drop, and practical HVAC duct sizing concepts.
✅ Airflow Before Charging
Verify airflow before making charging decisions. Connect comfort complaints to duct, filter, coil, and blower conditions.
Heating, Heat Pumps & Troubleshooting
🔥 Gas Furnace Sequence
Follow the furnace sequence of operation: inducer, pressure switch, igniter, gas valve, flame sensor, and blower.
🔥 Gas Furnace Basics
Explain furnace parts, efficiency, combustion, flame sensing, limits, and the major sections of a gas furnace.
🔁 Heat Pump Basics
Heat pump operating principles, heating/cooling mode, defrost board, reversing valve, and outdoor unit components.
🔁 How Heat Pumps Work
Engineering-style explanation of how heat pumps move heat and reverse the refrigeration cycle.
Professional Path
🧠 No Cooling Troubleshooting
Work through a common AC-not-starting complaint and think through likely electrical and component failures.
🧠 Troubleshooting the AC System
Connect the refrigeration cycle to real diagnostic thinking and symptom-based troubleshooting.
📐 Heat Pump Wiring Diagram
Read a heat pump wiring diagram and understand components, controls, safeties, and operating sequence.
🔧 Outdoor Heat Pump Components
Identify outdoor heat pump electrical and refrigerant components and understand service diagnostic points.