Synthetic Pleated Media: Increased surface area for superior dust-holding capacity compared to standard glass fiber filters

shielded cable should be utilized to maintain signal integrity

Robust SPST Logic: Simplified single pole single throw operation provides a reliable "normally open" or "normally closed" circuit path for the ignition controller

which is essential for maintaining the volumetric efficiency of the system

Lennox 93W72 Limit Switch 321142-301 Synthetic Pleated Media: Increased surfaceThe Lennox 93W72 Limit Switch (also identified as L155 30F) is a critical safety component designed for precise thermal regulation in residential and commercial heating systems. This genuine OEM Lennox replacement part is engineered to monitor internal furnace temperatures and disrupt the electrical circuit if the heat exceeds the safety threshold of 155F. Featuring an auto reset function, the switch restores the circuit once temperatures drop by 30F