The Lennox 21L17 (part number 102993-19) is a factory-authorized replacement module designed for use in the Lennox CBA25UHV-24 air handler. This control board governs key operational features, including variable-speed fan control, system diagnostics, and communication with the thermostat and other HVAC components. Built to meet Lennox's high standards, the module ensures seamless integration and long-term system reliability.Specifications:

• Part Numbers: 21L17 / 102993-19
• Application: Replacement control module for Lennox CBA25UHV-24 air handler
• Control Type: Microprocessor-based module for intelligent system regulation
• Voltage: 24V control signal input (standard for HVAC communication systems)
• Compatibility: Designed exclusively for use with Lennox CBA25UHV-024 series models
• Functions:
  • Variable-speed blower motor control
  • Integrated system diagnostics and fault code display
  • Low-voltage signal processing from thermostat and sensors
  • Interface for defrost control in heat pump applications
• Installation: Plug-and-play replacement; professional installation recommended
• Dimensions: Approx. 6.5" x 4.5" (PCB board size; verify in system manual)
• Certifications: UL recognized component; Lennox OEM replacement part

Benefits:

• Ensures factory-level performance and reliability
• Maintains energy efficiency and proper airflow management
• Reduces downtime by restoring full system functionality

Available now at Beenimax – your reliable source for authentic Lennox HVAC components.