This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- The distinction between visual checklist maintenance and quantitative measured proof of performance on NATE exams.
- How to accurately evaluate electrical health through capacitor microfarad tolerances and loaded voltage checks.
- Airflow verification techniques using total external static pressure and furnace temperature rise over simple filter checks.
- Combustion analysis and heat exchanger safety testing methods, including flame pattern shifts and CO detection.
- Proper refrigerant diagnostic procedures comparing calculated target superheat and subcooling against fixed and TXV metering systems.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

NATE HVAC Exam Prep 48, Preventive Maintenance that Proves Performance

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