Technician Path

Refrigerant, airflow and combustion diagnostics through to full system troubleshooting.

1. 01Superheat and Subcooling
   Concept
   The two measurements that tell you how a refrigerant circuit is really being fed and drained.
2. 02Digital Manifold
   Tool
   Pressures, saturation temperatures, superheat and subcooling from one instrument.
3. 03Refrigerant Types and Handling
   Concept
   Blends, glide, safety classifications and why you never mix refrigerants or charge a blend as vapor.
4. 04Evacuation and Dehydration
   Procedure
   Pulling a proper vacuum, why the micron gauge matters, and how to prove the system is dry and tight.
5. 05Vacuum Pump and Micron Gauge
   Tool
   The tools that make a proper evacuation possible, and how to keep them working.
6. 06Refrigerant Recovery
   Procedure
   Removing refrigerant from a system safely and legally, with correct cylinder handling.
7. 07Leak Detection
   Procedure
   Finding refrigerant leaks methodically instead of adding refrigerant and hoping.
8. 08Brazing and Tubing Practice
   Procedure
   Making clean, leak free refrigerant joints with nitrogen flowing, and working safely with heat.
9. 09Refrigerant Charging
   Procedure
   A measurement driven approach to charging, using the method the metering device calls for.
10. 10Restriction in the Refrigerant Circuit
    Troubleshooting
    Recognising a plugged drier, a kinked line or a failing metering device from the readings they produce.
11. 11Non-Condensable Gases in the System
    Troubleshooting
    Why air trapped in a system raises head pressure, and how to confirm and correct it.
12. 12Static Pressure and Duct Diagnostics
    Concept
    Measuring total external static pressure and using it to find where a duct system is choking.
13. 13Manometer
    Tool
    Measuring gas pressure and static pressure in inches of water column.
14. 14Anemometer and Airflow Measurement
    Tool
    Measuring air velocity and airflow at grilles, in ducts and at the equipment.
15. 15Duct Design and Airflow Delivery
    Concept
    Sizing, friction, fittings and the reasons a duct system fails to deliver what the equipment can produce.
16. 16Combustion Basics
    Concept
    What clean combustion requires, what the products of combustion tell you, and why analysis beats guessing.
17. 17Combustion Analyzer
    Tool
    The instrument that turns combustion from an opinion into a measurement.
18. 18Venting and Draft
    Concept
    Vent categories, why draft matters, and the failures that put combustion products into the building.
19. 19Carbon Monoxide Safety
    Concept
    Where carbon monoxide comes from, how it is measured, and what to do when readings are elevated.
20. 20Gas Furnace: No Heat
    Troubleshooting
    The furnace is calling for heat but the burners never light, or they light and then shut down.
21. 21Air Conditioner Not Cooling
    Troubleshooting
    A measurement led approach to poor cooling, starting with airflow rather than the gauges.
22. 22Heat Pump Not Heating
    Troubleshooting
    Working through weak or absent heat pump heating, including auxiliary heat and defrost behaviour.
23. 23Indoor Blower Will Not Run
    Troubleshooting
    Tracing a dead blower across PSC and ECM equipment without guessing at parts.
24. 24Outdoor Unit Will Not Start
    Troubleshooting
    A structured electrical walk through when the condensing unit stays silent on a call for cooling.
25. 25Low Voltage Fuse Keeps Blowing
    Troubleshooting
    Finding the short in a 24 volt control circuit rather than replacing fuses and transformers.
26. 26System Commissioning and Startup
    Procedure
    The measurements that prove a new installation actually performs, and the record that protects everyone later.
27. 27Preventive Maintenance
    Procedure
    What a real maintenance visit covers on heating and cooling equipment, and why measurement beats inspection.