Highlighted rows indicate typical operating range for residential cooling applications. Liquid pressure = bubble point. Vapor pressure = dew point.
| Temp (°F) | Liquid Pressure (psig) | Vapor Pressure (psig) | Glide (psi) |
|---|
Superheat is measured at the suction line near the indoor coil. Subcooling is measured at the liquid line leaving the condenser. Compare your measured values to these targets to determine charge status. Always verify metering device type before diagnosing charge issues.
R-410A is being phased down under EPA regulations. New equipment manufactured after January 1, 2025 must use lower-GWP refrigerants such as R-32, R-454B, or R-466A. R-410A will remain in the field on existing equipment for years to come. Techs should begin familiarizing with replacement refrigerant PT charts and handling requirements.