HVAC Service Technician — six learning paths
Curriculum and interactive diagnostic decision labs are one path, not two products. Every major module ends in a lab that forces the sequence real work demands: observe, hypothesise, test, decide, confirm the root cause, verify the repair.
Path B — Commercial Refrigeration / RAC — is open now. Paths A, C, D, E and F are in development and release path by path. Free labs from Path B and Path C are playable today, no account needed.
- Interactive decision labs
- Built by working technicians
- Path-based verifiable certificate
- Exam preparation only
- Worldwide online
The six paths
Path A · Residential HVAC Service & Diagnostics
Systematic diagnosis and verification of residential AC, heat pumps and furnaces.
6 modules · 5 signature labs
Certified Residential HVAC Diagnostic Technician
Curriculum in developmentPath B · Commercial Refrigeration / RAC
Own commercial refrigeration diagnostics — the higher-skill, less-crowded niche.
7 modules · 5 signature labs
Certified Commercial Refrigeration / RAC Technician
Open the path →Path C · Commercial HVAC Systems (RTU focus)
Diagnose packaged rooftop units, economizers, VAV and basic controls.
8 modules · 5 signature labs
Certified Commercial HVAC Technician
Curriculum in developmentPath D · Installation, Start-up & Commissioning
Move technicians from service-only to correct installation and verified start-up.
9 modules · 5 signature labs
Certified HVAC Installation & Commissioning Technician
Curriculum in developmentPath E · Project Planning & Execution
Read the drawings, understand the job plan and sequence the work.
8 modules · 4 signature labs
Certified HVAC Project & Install Planner
Curriculum in developmentPath F · Full Diagnostic + Systems Technician (flagship)
Paths A, B and C plus key elements of D, advanced multi-system labs and a timed capstone gauntlet.
6 modules · 3 signature labs
FixGrid Certified Full Systems Technician
Curriculum in developmentShared foundation, every path
- Electrical fundamentals
- Multimeter mastery
- Refrigeration cycle
- Tools and safety
- Diagnostic logic
Free labs, playable now
No account needed. These are the same graded labs used inside the paid path.
Walk-in Cooler Not Holding Temperature
Walk-in cooler is running but product temperature is rising. Box is at 48°F, setpoint 35°F.
Start the lab →Ice Machine Not Making Ice
Ice machine is running but producing little or no ice. Bin is nearly empty.
Start the lab →Walk-in Freezer Defrost Fault
Walk-in freezer keeps icing up. Product temperature climbs a few degrees each day and the customer has been scraping the coil by hand.
Start the lab →Rooftop Unit Not Cooling
Retail space is warm. Thermostat is calling for cooling, the supply fan runs, but the air out of the diffusers is not cold.
Start the lab →Regional exam-prep notes
- United States
- Supports preparation for EPA 608 (Type II / Universal) and related NATE content. We do not issue the EPA or NATE credential.
- South Africa
- Aligns with safe-handling expectations under SAQCC Gas / SARACCA pathways. We prepare; SAQCC Gas issues the authorisation.
- Kenya / East Africa
- Supports good-servicing practice and RAC technician competence relevant to NITA / EPRA-adjacent work. Official authorisations remain with the relevant bodies.
- India
- Aligns with ESSCI RAC Service Technician (NSQF) and HPMP Good Servicing Practices orientation. ESSCI and the Ozone Cell issue official credentials.
Always verify current requirements with the authority in your jurisdiction.
Adjacent programs
Solar Technical Training is live inside EcoPowerHub Academy with the same lab standard. Appliance repair and sealed-system fundamentals are delivered on FixGrid Academy, our appliance-repair property and a natural on-ramp into commercial refrigeration.