Carrier 40RM500072 Blower Plate 321702 401 but ensure the operating environment but ensure the operating environment does not exceed the 135°F limit typically dictated by the blower motor's thermal protections Remote Sensing Precision: The remote bulb with capillary allows for temperature monitoring in tight or inaccessible terminal air conditioning unit compartments We recommend inspecting existing hardware for shear or rust and replacing fasteners with grade rated bolts to ensure the blower motor operation remains stable the 40RM500072 is designed to withstand the high static pressure and constant torque cycles common in commercial indoor fan coil units