R40403-003 Furnace Blower Control Circuit Board Replacement Fit for Armstrong Ultra SX 80 SX90 Honeywell ST9120C Ducane Lennox, Replaces 40403-001, 40403-002, ST9120 A, B or C Blower Controllers

Key Features

• Direct Replacement Board: Furnace blower control circuit board fit for Concord furnaces Armstrong Ultra SX 80 SX90 Honeywell ST9120C Ducane Lennox
• Replace Part Number: Replaces 40403-001, 40403-002, 40403-003, 20054502 and ST9120A/B/C blower controls. Also Replaces R40403-001, R40403-002, R40403-003, 20054501, ST9120C 2010, 1138-83-1002A, 87H88, R20054502, R38493B001, 87H8801. 1138-100, 1711, HCSI PLC=0, 164322, T9AV5D12-22, 16391, CPC E 94V0, 1138-83-1003A
• Restore Furnace Operation: Helps solve common issues such as blower motor not starting, fan running continuously, delayed startup, weak airflow, or no heat caused by a failed control board
• Upgraded Components: Built with durable PCB materials, precision soldering, 5A replaceable fuse protection, and stable electrical performance for long service life
• Quick Replacement Design: Terminal layout designed for straightforward swap with existing board. Taking a photo of original wiring before removal is recommended