Lennox 11W00 Piston Assembly 321894-709 meaning it breaks the circuit

meaning it breaks the circuit on a temperature drop

Check existing system requirements to ensure the metering device is sized correctly for the R-410A charge

This 140-160F AUTO limit switch features a bimetal disc that opens the electrical circuit when internal plenum temperatures exceed the 160

Whether used for initial system dehydration or as a system cleanup core following a terminal failure

the control board cannot verify combustion blower operation

Lennox 11W00 Piston Assembly 321894-709 meaning it breaks the circuitThe Lennox 11W00 Piston Assembly is a precision engineered . 067 fixed orifice metering device designed for consistent refrigerant flow control in Lennox and Allied Air residential cooling systems. Engineered for high pressure durability, this HVAC expansion piston ensures optimal evaporator coil performance by maintaining the necessary pressure drop between the liquid line and the coil. Whether you are performing a dry charge unit installation or