96K views · 734 reactions | Bert is discussing proper charging techniques for electronic expansion valve systems in our Ductless Mini-Split Troubleshooting video. Check it out on our YouTube page or right on the HVAC School website here: https://buff.ly/6oa0pQi | HVAC School | Facebook

40K views · 405 reactions | Subcooling starts in the bottom rows of the condenser, and you can actually see it with a thermal camera. Capturing a series of thermal images can really help you see how much space is taken up by de-superheating, condensing, and subcooling refrigerant. Our latest video is about measuring subcooling on R-454B systems and troubleshooting them. You can watch it on our website at: https://buff.ly/AF8W9yD | HVAC School | Facebook

315K views · 3.4K reactions | Struggling with TXV (Thermostatic Expansion Valve) diagnosis? This video dives into the essential techniques every HVAC technician needs to master for accurate system troubleshooting. Watch on YouTube or directly on the HVAC School website here: https://buff.ly/EszxdQy | HVAC School | Facebook