🔍 Key Concepts

• Behavior of refrigerant in the liquid line versus the suction line • Typical signs of restriction in a refrigeration system • Where frosting/sweating normally appears during proper operation

💭 Think About

• Ask yourself: under normal, healthy operation, which line in a refrigeration system is expected to be cold enough to sweat or frost? • Think about what happens to pressure and temperature in the liquid line if there is a partial blockage. • Consider whether high room humidity alone can make a properly operating liquid line frost, or whether some system problem is usually involved.

✅ Before You Answer

• Identify which component or section of the system is normally cold (evaporator/suction side) vs normally warm (liquid line). • Verify what a liquid line restriction does to refrigerant pressure and temperature on the upstream and downstream sides. • Confirm whether proper cooling would more likely cause sweating/frosting on the suction line or on the liquid line.