Replacement Motor, 21V

Direct OEM replacement integrated furnace control board designed for select two-stage Carrier and ICP furnaces. This board is a drop-in substitute for the White-Rodgers 21V51D-751 and provides comprehensive control and diagnostics for PSC, variable speed, and ECMx blower motor applications. Operating at 120 VAC, this control board features all required harnesses pre-installed for seamless integration, including connections for ICP two-stage furnace configurations, enabling quick mounting on standard equipment trays. The board incorporates diagnostic tri-color LED indicators that display operational status and fault codes, which can be retrieved via integrated pushbutton control. This self-test routine functionality reduces troubleshooting time in the field. The unit delivers 120V outputs for auxiliary components including air cleaner control (up to 1A maximum), humidifier control (up to 1A maximum), and ignitor supply, accommodating diverse system configurations. Factory-programmed safety timings include 15-second pre-purge cycles and 240-second lock-out protection to ensure reliable furnace operation. The board supports adjustable fan delay settings and provides a continuous low-speed fan mode option for enhanced air cleaning and temperature balance throughout the home or building. Automotive-style replaceable fuses protect critical circuits. Ideal for HVAC technicians and contractors requiring reliable controls for mid-range furnace systems, this replacement board delivers OEM-equivalent performance and reliability at competitive pricing.