Four tracks. Foundations first, then six job-activity modules mapped one-to-one to the official exam blueprint — with depth weighted to how much each is tested.
The underpinning knowledge the exam assumes you already have.
P–T relationship, superheat, subcooling, the P-H diagram.
Refrigerant types, ODP/GWP, AIM Act / R-410A phase-out, recovery.
Circuits, motors, capacitors, contactors, reading wiring diagrams.
Copper, brazing, nitrogen purge, leak test, deep vacuum.
Compressors, condensers, evaporators, metering devices, accessories.
Thermostats, safeties, sequence of operation, intro to DDC/BMS.
Airflow, ventilation, the psych chart, heating overview.
Six modules, one per Major Work Activity. Depth = exam weight.
Safety, tools, work organization, communication.
Site prep, rigging & handling, layout, fabrication.
Drawings/specs, sizing, selecting equipment & controls, codes.
Mounting, piping, wiring, installing controls. Biggest install block.
Leak test → evacuate → charge → startup → balance → verify.
Diagnostics, troubleshooting, repair, control-system service. Biggest MWA.
End of every module.
Distributed by exam weight, every answer explained.
Full 125-question exams at 70%, scored by activity.
Pass the completion exam, earn your certificate.*
*Certificate of completion — not the official Certificate of Qualification.
Learn the refrigeration cycle in 20 minutes, then take your diagnostic.
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