Lochinvar & A.O. Smith 100288429 Switch 322838-753 As a genuine Johnson Controls

As a genuine Johnson Controls component

Key Benefits: Consistent Timing: Synchronous motor provides a stable 30-second stroke (60 Hz) independent of load fluctuations

Quick Field Replacement: Lightweight and rigid construction allows for rapid sliding exchanges during routine maintenance calls

Durable Construction: Features stainless steel bellows and a temperature-compensated time relay for accurate performance from -40°F to 140°F

Zero Pressure Differential: The normally closed design ensures the valve remains shut without requiring system pressure to maintain the seal

Lochinvar & A.O. Smith 100288429 Switch 322838-753 As a genuine Johnson ControlsThe Lochinvar & A. O. Smith 100288429 Switch is a critical safety component designed for precise air pressure sensing in high efficiency heating systems. This OEM replacement part is factory calibrated to a 3. 90" water column (WC) set point, serving as a primary air proving switch to ensure the blower motor is moving sufficient combustion air before the ignition sequence begins. Engineered for compatibility with specific Lochinvar boilers and A. O.