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This is the factory OEM fan blower control board (part number HK61EA006), the direct replacement for the Carrier FA4BNC030010AAAA air handler unit. The control board is the brain of your air handler — it orchestrates blower motor operation, fan speed sequencing, and communicates with the thermostat to manage heating, cooling, and continuous fan modes. When this board fails, common symptoms include the blower fan not starting, running continuously regardless of thermostat commands, erratic or incorrect fan speeds, error codes on your thermostat, or a complete system lockout with no response to any call for heating or cooling.
Compatibility: Designed specifically for the Carrier FA4BNC030010AAAA residential air handler. Always verify your existing board's part number against HK61EA006 printed on the board label before ordering. Need help confirming fitment? Our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork, no return hassle.