Why Evaporator Freezing Happens, and the Fix

In this video

Evaporator freezing happens when there is not enough heat load across the coil for the refrigerant conditions — low airflow or low load drops the coil below freezing and ice forms, which cuts capacity further and can send liquid back to the compressor. This explains the mechanism and how matching capacity to the load with the APR Control keeps the coil above freezing.

Key takeaways

• Freezing occurs when load or airflow is too low for the coil’s capacity
• Ice reduces capacity further and can lead to liquid return
• Matching capacity to load keeps the coil above freezing
• APR Control modulates to prevent the low-load freeze condition