MCC143906 Motherboard Fan Power Supply Board 4316V378 for Air Conditioner Keep your air conditioner's fan running reliably with this directreplacement motherboard fan power supply board. Designed as the MCC143906 replacement for part number 4316V378, this board restores stable power and control to the fan circuit so your unit can cool effectively and quietly. Key benefits Restores fan operation quickly: replaces a failed fan power supply board to get your air conditioner back to normal without replacing the entire unit. Reliable power delivery: stabilizes fan voltage and control signals so the blower runs smoothly and consistently. Servicefriendly replacement: identified by model MCC143906 and part number 4316V378 for straightforward matching and installation. Reduces downtime and costs: a targeted option for technicians and homeowners that avoids more expensive component swaps. What this board does (functionality) Provides the power and control interface for the air conditioner fan motor from the main motherboard. Regulates and supplies the appropriate fan drive signals so the fan starts, runs at the correct speeds, and responds to the unit's control commands. Compatibility Model: MCC143906 Part/reference number: 4316V378 Designed for use in air conditioner units that require the MCC143906 / 4316V378 fan power supply board. Confirm compatibility with your service documentation or the existing board part number before . Key attributes Purposebuilt function: fan power supply / control board for air conditioners. Form factor: compact replacement board that fits in the original mounting location (verify fit against the existing board). Identification: clearly labeled MCC143906 and 4316V378 for accurate matching during repairs. Performance focus: restores proper fan startup, speed control, and operation as intended by the manufacturer. Use cases and applications a residential split or window air conditioner whose fan stopped running due to a failed fan power board—restore cooling without full unit replacement. Field service and maintenance: technicians can keep this board in stock for quick onsite replacement during routine HVAC repairs. Preventive replacement during major service: an aging fan power board when performing broader maintenance to avoid future failures and emergency callouts. Installation and service notes Intended as a direct replacement—ensure the board part number matches MCC143906 / 4316V378 on your existing component. Installation should be performed by a qualified technician or a person experienced with electrical and HVAC repairs to ensure safe, correct wiring and mounting. Power should be disconnected before removing the existing board to avoid shock or damage. Why customers choose this part Exactmatch identification (MCC143906, 4316V378) for confident purchases. Targeted solution that saves time and cost compared with replacing larger assemblies. Clear function: dedicated to restoring fan power and control for air conditioner units. If your air conditioner fan is not operating or is inconsistent, confirm the board part number on your unit and consider the MCC143906 (4316V378) fan power supply board as a focused, effective option.