Replacing it with a 2-pole unit will leave a phase energized or result in incomplete circuit isolation

Rely on this OEM ignition component to keep your gas furnace or boiler running reliably through the peak heating season

System Reliability: Heavy-duty construction designed for high-cycle environments in residential and light commercial HVAC units

This OEM replacement part is the functional direct successor to the 20215702S

If you are servicing an O-series normally open valve

Lennox 10W57 Circuit Board Els PW 17895 Replacing it with a 2-poleThe Lennox 10W57 Circuit Board is a critical OEM replacement component designed for high efficiency residential gas furnaces and air handlers. Engineered for precision system control, this HVAC control board replacement serves as the primary logic center for blower timing, ignition sequencing, and integrated safety monitoring. It is the definitive direct cross version of R76700013 and also replaces part numbers R45632 001 and ICM AH4103, ensuring