Trane CNT3159 Pressure Switch 320735-701 allowing only vapor to exit

allowing only vapor to exit while metering oil back to the crankcase through a calibrated orifice

this blower motor is designed for high-static air handling in both residential and commercial furnace and AC evaporator setups

not a scroll compressor

it must be paired with a matching condenser and correctly sized metering device (orifice or TXV) to maintain proper subcooling and superheat levels

significantly reducing potential failure points

Trane CNT3159 Pressure Switch 320735-701 allowing only vapor to exitThe Trane CNT3159 Pressure Switch is an essential high pressure cut out designed for precise refrigerant circuit monitoring in residential and light commercial HVAC units. This SPNO (Single Pole Normally Open) switch serves as a critical safety component, engineered to open the circuit when system pressure reaches 400 PSI and reset upon falling to 250 PSI. Built for compatibility with modern high pressure refrigerants like R 410A, the CNT3159 prevents