York / Johnson Controls S1-03103892000 Defrost Control Board – Genuine OEM 2-Stage Defrost Circuit Board

York / Johnson Controls S1-03103892000 Defrost Control Board – Genuine OEM 2-Stage Defrost Circuit Board The York S1-03103892000 Defrost Control Board is a genuine OEM electronic defrost circuit board engineered to manage defrost operations in residential and light commercial heat pump systems. Designed as a two-stage defrost control board, this component monitors outdoor coil conditions and initiates automatic defrost cycles to maintain efficient heating performance during cold-weather operation. Built to OEM specifications for precise system compatibility and reliable operation, the S1-03103892000 control board coordinates compressor, reversing valve, and outdoor fan functions during defrost cycles. Its factory-programmed logic helps prevent excessive frost accumulation on outdoor coils, improving system efficiency, heating capacity, and equipment reliability. Key Features and Function: • Two-Stage Defrost Control – Manages heat pump defrost cycles for optimal system performance • Genuine OEM Compatibility – Designed specifically for York, Luxaire, Coleman, and Johnson Controls systems • Automatic Frost Management – Helps prevent outdoor coil ice buildup • Integrated System Protection – Supports reliable compressor and heat pump operation Product Details and Key Specifications: • Part Number: S1-03103892000 • Alternate Part Number: 286B0389 • Manufacturer: Johnson Controls / York (Genuine OEM) • Part Type: Defrost Control Board • Board Type: 2-Stage Electronic Defrost Circuit Board • Application: Residential & Light Commercial Heat Pump Systems • Function: Controls Heat Pump Defrost Cycles and Outdoor Unit Operation • Installation Type: Direct OEM Replacement • Compatible Brands: York, Coleman, Luxaire, Fraser-Johnston, Guardian • Electrical Compatibility: OEM Factory Matched • Shipping Weight: Approx. 1-2 lbs 🛠️ HVAC Depot Pro Tip: Check Sensors Before Replacing the Defrost Board Defrost issues are not always caused by a failed control board. Before replacing the board, inspect the defrost sensor, coil temperature sensor, low-voltage wiring, and outdoor fan motor operation. A defective sensor can prevent proper defrost initiation and mimic board failure. Cross-Reference & Compatibility: The S1-03103892000 is a direct OEM replacement for the following applications: • OEM Number: S1-03103892000 • Alternate Number: 286B0389 • Application Type: Heat Pump Defrost Control Boards • Board Style: 2-Stage Electronic Defrost Control • Compatible Brands: York, Coleman, Luxaire, Fraser-Johnston, Guardian Extensive Model Compatibility List: Compatible Heat Pump Systems: • York Heat Pump Systems • Coleman Heat Pump Systems • Luxaire Heat Pump Systems • Fraser-Johnston Heat Pumps • Guardian Heat Pump Units • Residential Split-System Heat Pumps • Light Commercial Heat Pump Equipment • Select Johnson Controls HVAC Systems Always verify the board number, wiring configuration, and model compatibility before ordering.