normally closed (N/C) coil

providing stable and repeatable linear movement

preventing hunting and ensuring consistent performance

ensuring long-term reliability without the need for complex recalibration or linkage adjustments

ensuring accurate motor torque and efficient compressor startup

Lochinvar & A.O. Smith 100208324 Switch 320720-756 normally closed (N/C) coilThe Lochinvar & A. O. Smith 100208324 On Off Switch is a critical OEM replacement part designed for precise burner power control in high efficiency hydronic heating systems. As a veteran grade HVAC rocker switch, it provides a reliable interface for manual system cycling and emergency shutdowns. This specific 100208324 switch is engineered to meet the exact electrical specifications required for Lochinvar boiler models and A. O. Smith water heaters,