McDonnell & Miller 354081 Replacement Probe Els PW 17895 SPDT Versatility: The 3-terminal SPDT

SPDT Versatility: The 3-terminal SPDT configuration allows for integration into various control board logic paths for both safety and status signaling

This axial fan blade features a counter-clockwise (CCW) rotation and is designed with a 1/2-inch bore on the intake side

Most failures stem from carbon fouling or "sooting" and cracked ceramic insulators caused by improper mounting torque or excessive thermal cycling

it often indicates the need for a total rubber kit to address both the check modules and the RV diaphragm simultaneously

If your multimeter shows continuity but resistance has doubled from these baseline specs

McDonnell & Miller 354081 Replacement Probe Els PW 17895 SPDT Versatility: The 3-terminal SPDTThe McDonnell & Miller 354081 Replacement Probe is a critical component for maintaining secondary low water cut off (LWCO) functionality in commercial and residential boiler systems. This 3 4" NPT probe serves as the sensing element for Series PS 800, PS 850, and PA 800 remote probe controllers. Engineered for high pressure environments, this stainless steel probe detects water levels via conductivity, ensuring the burner circuit is interrupted if a