It is a normally closed (NC) switch that serves as a primary safety fallback

Technicians should check for continuity across the terminals when the system pressure is above 44 PSI

reducing the need for specialized hardware

reducing the risk of bearing washouts

Nidec-US Motors 6633 Motor L99H008 It is a normally closedThe Nidec US Motors 6633 Motor is a high efficiency Pro Programmed ECM blower motor designed specifically for demanding HVACR applications. This 48 frame constant torque motor provides a versatile solution for service technicians, featuring a variable horsepower rating of 1 3 to 1 2 HP. Engineered for dual voltage flexibility, it operates seamlessly on 115 208 230V systems at 1075 RPM. As a direct replacement for HD44AE155 and S1 024 35688 005, this