Why This Zone System Kept Freezing the Coil

A day after replacing an evaporator coil, I got the call every HVAC tech hates to hear… the system froze up. On this service call, I walk through my diagnostic process on a zoned HVAC system to figure out why the evaporator coil iced over. Was it airflow? Refrigerant charge? Something wrong with the new coil installation? What we found was a great reminder that not every freeze-up is caused by low refrigerant or dirty filters. In this video you’ll see: ✅ Freeze-up diagnostics ✅ Zoned system troubleshooting ✅ Airflow and low-load conditions ✅ Why discharge air sensors matter ✅ Real-world HVAC problem solving Whether you’re a homeowner trying to understand your system or an HVAC technician looking to sharpen your diagnostic skills, I hope this video helps. Thanks for watching and supporting the channel! #HVAC #AirConditioning #HVACTech #EvaporatorCoil #ZoneSystem #HVACService #JustinTimeHVAC