McDonnell & Miller 354081 Replacement Probe Els PW 17895 The Lennox 99K45 HVAC replacement

The Lennox 99K45 HVAC replacement fan blade is a heavy-duty 24-inch condenser fan blade designed for critical airflow management in residential and light commercial outdoor units

Integrating this genuine Rheem furnace part ensures electrical compatibility with the furnace control board and prevents the nuisance trip codes common with "one-size-fits-all" universal alternatives

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

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

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

McDonnell & Miller 354081 Replacement Probe Els PW 17895 The Lennox 99K45 HVAC replacementThe 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