Uploaded October 2025 | Updated September 2026, 3 weeks ago
Learn essential HVAC troubleshooting techniques for diagnosing air handler noise, sealing cabinet leaks, and measuring static pressure. This comprehensive training covers real-world scenarios that every HVAC technician needs to master.
What You'll Learn:
Air Handler Sealing
Why cabinet gaps and cracks act like "straws" pulling in moisture and dirt
How to identify dust tracking patterns that reveal air leaks
Proper sealing techniques using silver tape, silicone, and masking tape
When and how to use different sealing materials for permanent vs. removable panels
Static Pressure Diagnostics
Understanding what ECM motors actually "see" vs. total external static pressure
How high static pressure damages blower wheels and motors
Why you should never just sell a fan replacement without finding the root cause
Zonal Pressure Testing
Room-to-room pressure measurement techniques using precision manometers
Understanding pascal readings and what they mean for comfort and efficiency
How pressure imbalances affect humidity, infiltration, and energy costs
Real case study: 7 pascal bedroom measurement and customer consultation
Advanced Troubleshooting Tips
Low suction pressure diagnosis: always start with airflow
Using thermal imaging and vane anemometers for ductwork verification
Filter bypass issues and upgrade recommendations
Connecting equipment problems to building envelope issues
Key Takeaways:
Noise at air handlers usually indicates sealing problems
Air leaks cause moisture infiltration, bypassing filtration, and comfort issues
Proper sealing techniques prevent long-term equipment damage
Pressure imbalances affect the entire home's comfort and efficiency
Always clean surfaces with alcohol before applying tape or sealant
This training emphasizes practical, field-tested solutions that technicians can implement immediately. Perfect for both new technicians learning diagnostics and experienced techs wanting to expand their building science knowledge.
Tools Mentioned:
Precision manometers
Vane anemometers
Thermal imaging cameras
True flow grids
Tape squeegees
Silver tape, masking tape, silicone sealant
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
Learn essential HVAC troubleshooting techniques for diagnosing air handler noise, sealing cabinet leaks, and measuring static pressure. This comprehensive training covers real-world scenarios that every HVAC technician needs to master.
What You'll Learn:
Air Handler Sealing
Why cabinet gaps and cracks act like "straws" pulling in moisture and dirt
How to identify dust tracking patterns that reveal air leaks
Proper sealing techniques using silver tape, silicone, and masking tape
When and how to use different sealing materials for permanent vs. removable panels
Static Pressure Diagnostics
Understanding what ECM motors actually "see" vs. total external static pressure
How high static pressure damages blower wheels and motors
Why you should never just sell a fan replacement without finding the root cause
Zonal Pressure Testing
Room-to-room pressure measurement techniques using precision manometers
Understanding pascal readings and what they mean for comfort and efficiency
How pressure imbalances affect humidity, infiltration, and energy costs
Real case study: 7 pascal bedroom measurement and customer consultation
Advanced Troubleshooting Tips
Low suction pressure diagnosis: always start with airflow
Using thermal imaging and vane anemometers for ductwork verification
Filter bypass issues and upgrade recommendations
Connecting equipment problems to building envelope issues
Key Takeaways:
Noise at air handlers usually indicates sealing problems
Air leaks cause moisture infiltration, bypassing filtration, and comfort issues
Proper sealing techniques prevent long-term equipment damage
Pressure imbalances affect the entire home's comfort and efficiency
Always clean surfaces with alcohol before applying tape or sealant
This training emphasizes practical, field-tested solutions that technicians can implement immediately. Perfect for both new technicians learning diagnostics and experienced techs wanting to expand their building science knowledge.
Tools Mentioned:
Precision manometers
Vane anemometers
Thermal imaging cameras
True flow grids
Tape squeegees
Silver tape, masking tape, silicone sealant
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
