Features: The furnace blower control circuit board is a replacement part that ensures compatibility with multiple models, providing superior electrical performances and durability. Featuring dip switches for adjustable blower delay and a 5A fuses for the 24V circuit, this control board guarantees safe and stable operation, enhancing your furnace's efficiency and lifespan. Ideal for professionals, home appliance repair technicians, and homeowners seeking high quality replacement parts to maintain optimal heating system performances. Perfect for residential heating systems during cold season, equipment maintenance, or new installations in both homes and small commercial spaces, ensuring reliable and efficient furnace operation. Designed with moisture and corrosion resistance, this circuit board operates quietly and efficiently, reducing noise while optimizing heat distribution and energy consumption, aligning with modern environmental standards. Specifications: Component: Plastic Part Number: R40403-003 40403-001 40403-002 40403-003 20054502 ST9120A ST9120B ST9120C 20054501 ST9120C 2010 1138-83-1002A 87H88 R20054502 R38493B001 87H8801 1138- 100 1711 HCSI PLC=0 164322 T9AV5D12-22 16391 Size: Approx. 5.7x4.44inch(14.48x11.28cm) Package Includes: 1x Circuit Board note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.