Ductless Install & Troubleshooting – Precision, Performance, and Best Pract

Ductless Install & Troubleshooting – Precision, Performance, and Best Practices with Johnstone Supply Training Classes

This hands-on training class is designed for HVAC professionals who want to confidently install, commission, and troubleshoot ductless and mini-split systems. We’ll cover proper system design considerations, installation best practices, and critical setup steps that ensure long-term reliability and peak performance.

You’ll gain a deeper understanding of ductless system components, controls, and communication, along with proven diagnostic methods for resolving common installation and service issues. From startup verification to advanced troubleshooting, this class focuses on real-world scenarios technicians face in the field.

The session is delivered in an open forum format, encouraging discussion around jobsite challenges, manufacturer nuances, and field-proven solutions—making the training practical, interactive, and immediately applicable.

Don’t miss this opportunity to elevate your ductless expertise and deliver cleaner installs, faster diagnostics, and happier customers.

1. Proper Ductless Installation Techniques – Learn best practices for mounting, piping, wiring, and condensate management.
2. Startup & Commissioning Procedures – Verify correct operation, settings, and performance before leaving the job.
3. Refrigerant Piping & Charging – Understand piping requirements, evacuation, charging methods, and common mistakes to avoid.
4. Controls & Communication Troubleshooting – Diagnose sensor issues, communication errors, and control-related faults.
5. Service & Maintenance Best Practices – Reduce callbacks and extend system life with proven maintenance and diagnostic strategies.



This class is ideal for technicians looking to master ductless systems and confidently handle both installs and service calls.

Know what’s Happening Next — before everyone else does.

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Host or Publisher Johnstone Supply of SE WI