Upgraded R40403-003 Furnace Blower Control Circuit Board, Replacement for ST9120C R40403-001 R40403-002 ST9120A ST9120B, Compatible with Armstrong Allied Ducane Magic Chef

Additional Details from the Manufacturer

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More features

• 【Direct Replacement and Wide Compatibility】This furnace blower control board directly replaces R40403-001, R40403-002, R40403-003, and 20054502. It is fully compatible with ST9120A, B, and C controls, and works with Armstrong, Allied, Ducane, Magic Chef, and other major brands
• 【Upgraded Design for Enhanced Durability】Engineered with improved power components to reduce overheating and extend lifespan. Features a 5-amp replaceable fuse for the 24V circuit and a dip switch for adjustable blower delay settings
• 【Precise Technical Specifications】Operating Line Voltage: 85–135 VAC, 50/60Hz. Secondary Control Voltage: 18–30 VAC. Max Blower Load: 15FLA/30LRA @120VAC. Max Inducer Load: 3FLA/10LRA @120VAC
• 【Easy Plug and Play Installation】No wiring modifications needed. Works with original and updated systems. For best results, take a photo of your current wiring before disconnecting to simplify reinstallation
• 【Reliable Performance and Moisture Resistance】Constructed with high-quality PCB materials and precision welding for stable operation. Resists moisture and corrosion, ensuring long-term durability in demanding conditions