AI-Powered Technical Skills Training

Build world-class
diagnostic skills.

The AI Repair & Diagnostic Trainer puts your techs through hundreds of real-world failure scenarios — AC units, furnaces, heat pumps, geothermal, and more.

500+
Diagnostic Scenarios
6
Equipment Categories
40%
Faster Tech Certifications
24/7
Train on Any Schedule
Training Library

Hundreds of scenarios across
every system your techs touch.

Each category covers the most common — and most costly — failures in the field.

84 scenarios

Central Air Conditioning

  • Refrigerant leaks & recharging
  • Compressor diagnostics
  • Evaporator coil freeze-ups
  • Condenser fan failures
  • TXV & metering devices
  • Electrical troubleshooting
72 scenarios

Gas & Electric Furnaces

  • Igniter & flame sensor issues
  • Heat exchanger cracks
  • Inducer motor failures
  • Pressure switch faults
  • Gas valve diagnostics
  • Limit switch troubleshooting
65 scenarios

Heat Pumps

  • Reversing valve failures
  • Defrost cycle issues
  • Low ambient performance
  • Auxiliary heat lockout
  • Refrigerant charge verification
  • COP & efficiency testing
48 scenarios

Geothermal Systems

  • Loop field diagnostics
  • Desuperheater issues
  • Water-to-air heat exchangers
  • Flow center troubleshooting
  • Loop pressure & antifreeze
  • Ground loop performance
56 scenarios

Mini-Split & VRF Systems

  • Multi-zone refrigerant balancing
  • Error code interpretation
  • Line set diagnostics
  • Indoor unit fan motors
  • Communication wiring faults
  • Commissioning procedures
38 scenarios

Controls & Thermostats

  • Smart thermostat wiring
  • Zoning system diagnostics
  • BMS/DDC integration
  • Low-voltage wiring issues
  • Humidity control systems
  • Demand control ventilation

How the Trainer Works

A simple loop that builds real skills fast.

01 /

Pick a Scenario

Choose from hundreds of real-world diagnostic cases across equipment types, difficulty levels, and failure modes.

02 /

Work Through the Diagnosis

The AI presents symptoms, customer complaints, and equipment readings. You make decisions just like you would on a real job.

03 /

Get Instant Feedback

After each step, the AI explains what was right, what was wrong, and why — reinforcing correct diagnostic logic.

04 /

Track & Improve

Managers see each tech's strengths and weak spots. Assign targeted scenarios to close specific skill gaps fast.

Connected Platform

Technical Confidence + Sales Confidence

The Diagnostic Trainer helps techs think through real HVAC problems. AI Roleplay helps them explain those problems to homeowners. Call Scoring and Manager Analytics help leadership see where each tech needs support.

TrainScoreCoachAutomate
"AI Nexus transformed our entire sales operation. The combination of AI roleplay, call scoring, and automated follow-up changed how our team works."
PG
Phillip Gonsalves
Owner & CEO, Air Masters of Tampa Bay
$12M HVAC Company · Tampa Bay

Common Questions

Build a team that can diagnose anything.

Give your techs the training edge that turns callbacks into confidence.

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