Precision Control: Features a three-pipe configuration for distinct heating and cooling control signals via air pressure modulation

seat washers

Service Mode: Includes a manual "hold open" switch to bypass the motor during troubleshooting or seasonal maintenance

allowing contractors to verify performance without breaking the circuit

Carrier HD46AR251 Blower Motor 320788-703 Precision Control: Features a three-pipeThe Carrier HD46AR251 Blower Motor is a high performance ECM X13 motor designed for direct drive heating and cooling applications. Operating at 3 4 HP, this electronically commutated motor delivers a maximum airflow of 1750 CFM and runs at a nominal 1050 RPM. Built for efficiency, it features a single phase design, 208 230V compatibility, and a 48 frame housing. The counter clockwise (CCW) rotation and 1 2 inch shaft diameter make it a standard OEM