Upgraded R40403-003 Furnace Blower Control Circuit Board ST9120C

Key features

• Direct Replacement and Wide CompatibilityThis 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 DurabilityEngineered 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 SpecificationsOperating 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 InstallationNo 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 ResistanceConstructed with high-quality PCB materials and precision welding for stable operation. Resists moisture and corrosion, ensuring long-term durability in demanding conditions

Free shipping included. 30-day hassle-free returns.