This part is specifically engineered for the Model 143 gas regulator

Combustion Precision: Maintains the critical air-tight seal required for proper pressure switch operation and stable flame signals

Efficient Ignition: Flat blade design maximizes surface area for rapid heating and reliable light-offs in 120V systems

Installation Efficiency: 1/4" sweat connections with extended ends facilitate fast installation in both vertical and horizontal orientations

ensuring a perfect fit and correct terminal alignment

Lennox 93J39 Limit Switch This part is specifically engineeredThe Lennox 93J39 limit switch is a critical safety component designed for precise thermal management in high efficiency HVAC systems. This 210F CO auto limit switch acts as a primary safety boundary, effectively breaking the electrical circuit when the heat exchanger plenum reaches the designated 210 degree Fahrenheit threshold. Engineered for seamless field replacement, the 93J39 is identical to 93J3901, ensuring zero latency compatibility for