Lennox 78L19 Expansion Valve Refrigerant it provides the necessary phase

it provides the necessary phase shift for split-phase motors to maintain optimal torque and energy efficiency

or 5-2 scheduling with a 2-pipe fan coil changeover input for seasonal efficiency

but ensure the Teflon sleeve is seated correctly to maintain a pressure seal

Always verify the model number on your furnace's gas valve before installation to ensure the regulator spring fits the housing

Lennox 78L19 Expansion Valve Refrigerant it provides the necessary phaseProper refrigerant metering is the backbone of any reliable HVACR system, and the Lennox 78L19 Expansion Valve is a critical component for maintaining precise superheat. Designed for high performance residential and light commercial equipment, this Thermostatic Expansion Valve (TXV) is chemically compatible with both R 410A and R 22 systems. The 78L19, which is identical to 78L1901, features a durable brass body with threaded connections, making it a