OEM Compatibility: Direct replacement for Lennox part 57M66 and 57M6601

As a veteran-grade blower motor mounting sleeve

This motor is a direct replacement for several ProTech and Emerson models

In a professional steam system maintenance setting

or "snowing" of the material

Reznor 270389 Pressure Switch 318973-401 OEM Compatibility: Direct replacement forThe Reznor 270389 Pressure Switch is a critical safety component calibrated to a . 33" WC set point, specifically engineered for Reznor unit heaters. This differential air pressure switch monitors the pressure drop across the heat exchanger, ensuring the induced draft blower is operating at the correct static pressure before allowing the ignition sequence to proceed. As a genuine OEM Reznor replacement part, it maintains the precise factory