Diagnosing HVAC Lightning and Electrical Surge Failures


*Important Notice:  You must first complete the Privacy Release Statement before accessing either the course or final quiz.

Millions of lightning strikes occur each year in the United States causing injury and damage to homes and equipment. This two-hour self-paced online course is designed to train HVAC technicians to use a systematic approach to troubleshoot, diagnose, and characterize if a system failure was caused by lightning strike and/or electrical surge damage.


Course Topics

  • Lightning strikes and the impact on HVAC units
  • Using the 5-Step troubleshooting process to isolate failures in HVAC units
  • Documenting and reporting findings


  • Describe the importance of identification of lightning strike and electrical surge damage
  • Identify the types of lightning strikes
  • Summarize lightning and electrical surge pattern characteristics
  • Identify system failure mode
  • Isolate failed sub-system
  • Analyze failed sub-system
  • Determine cause of failure
  • Characterize cause of failure
  • Summarize findings of independent laboratory testing
  • Document characterization of system failure
  • Pass an exam on Course Material

Target Audience

  • Experienced HVAC field technicians
Click here for terms and conditions...


Time Requirement


Web-Based Modules 2 hours $149.00

UL and the UL logo are trademarks of UL LLC © 2019.