Subcooling is the temperature drop of liquid refrigerant below its condensing saturation temperature. On TXV-equipped air conditioners, subcooling is the only reliable method to confirm accurate factory refrigerant charge.
⏱️ 5 min read
📊 Intermediate
⚙️ All TXV & Inverter Split AC Systems
How to Calculate Liquid Line Subcooling for Proper Charge Verification
Subcooling is the temperature drop of liquid refrigerant below its condensing saturation temperature. On TXV-equipped air conditioners, subcooling is the only reliable method to confirm accurate factory refrigerant…
⚠️ Identified System Fault Symptoms
- Flash gas bubbles in liquid line sight glass
- Undercharged circuit reducing overall cooling efficiency
- Overcharged circuit causing excessive high head pressure
Interactive Diagnostics
Verify System Readings With Our Engineering Tools
Input your field manifold pressures, suction temperatures, and electrical amperages into our calculation suite to compute superheat, subcooling, or compressor displacement.