ActronAir Low Pressure Switch R410A 1000L/13S protects the R410A refrigerant circuit on ESP Plus, Advance R32, and AIRES systems by cutting power to the compressor when suction pressure drops below the low-pressure set point specific to R410A operating conditions. R410A low-pressure switches operate at different pressure thresholds to R22 switches -- they are not interchangeable, and fitting an R22 switch in an R410A circuit risks inadequate low-pressure protection or nuisance tripping at normal operating pressures. Isolate power and recover refrigerant before replacing any refrigerant circuit pressure switches.