Lennox 54M90 Orifice 321042-401 Its single-pole single-throw (SPST) configuration

Its single-pole single-throw (SPST) configuration is rated for up to 10 A at 120 VAC

This part number covers the crankarm only

3/4 HP replacement engineered for demanding outdoor HVACR applications

it serves as a direct replacement motor for legacy part numbers 10219801

this main burner assembly facilitates precise signal communication to the safety controls

Lennox 54M90 Orifice 321042-401 Its single-pole single-throw (SPST) configurationThe Lennox 54M90 LP Orifice is a critical metering component designed for precise gas to propane conversion in compatible Lennox heating units. Engineered for durability and high tolerance performance, this 0. 034 inch orifice ensures steady pressure regulation and fuel flow, preventing common combustion issues such as soot buildup or irregular flame patterns. For contractors performing a Lennox furnace LP conversion, using OEM spec orifices is