The White Rodgers 47D43-811 is a microprocessor-based demand defrost control board engineered as a direct OEM replacement for Rheem heat pump systems. Designed to detect ice accumulation on the outdoor coil, this board initiates timely defrost cycles by reversing refrigerant flow, enhancing performance and energy efficiency in cold climates.Key Features:

• Self-Calibrating Operation: Automatically adjusts based on system behavior using differential temperature sensing.
• Defrost Timings:
  • Defrost Lockout Time: 34 minutes
  • Maximum Defrost Time: 15 minutes
  • Maximum Frosting Time: 6 hours
  • Short Cycle Lockout Time: 5 minutes
• Adjustable Defrost Termination Temperature: Selectable via DIP switch: 50°F, 60°F, 70°F (default), or 80°F.
• Diagnostic LEDs: Real-time fault codes and system status indicators for easy troubleshooting.
• Compressor Protection: Supports high/low pressure switch inputs and features multi-strike lockout safeguards.
• Blower Compatibility: Works with both PSC and ECM blower motors.
• Included Sensors: Comes with 48" ambient and coil temperature sensors for precise monitoring.

Specifications:

• Voltage Input: 24 VAC, 50/60 Hz
• Line Voltage: 208/240 VAC
• Operating Temperature: -40°F to 150°F
• Humidity Tolerance: 5% to 95% RH (non-condensing)
• Mounting: Plastic standoffs
• Dimensions: 5.51" H x 3.50" W x 1.13" D

Compatibility:
Replaces a wide range of Rheem defrost control part numbers, including 47-102685-85, 47-102685-04, 47-21517-22, and others.The White Rodgers 47D43-811 offers advanced, reliable performance for defrost management—ideal for contractors and HVAC technicians looking for a precise Rheem-compatible upgrade. Available now at Beenimax.