York S1-031-03498-001 Control Board
The York S1-031-03498-001 Demand Defrost Control Board is a critical OEM replacement part engineered for high-efficiency 14 SEER heat pump systems. As a veteran-grade HVAC control board, it is the direct factory successor to the S1-031-03877-000, ensuring seamless integration with York TH4 series units, including models TH4B3622SA, TH4B4822SA, and TH4B6022SA. Unlike standard time-temperature defrost boards, this demand defrost module utilizes advanced logic to initiate cycles only when necessary—monitoring ambient temperature, coil temperature, and compressor run time—which prevents unnecessary energy waste and reduces mechanical wear on the reversing valve and compressor.
Built for the rigors of split system heat pumps, the S1-031-03498-001 features integrated diagnostic LEDs for rapid HVAC troubleshooting and a 5-minute anti-short cycle delay (ASCD) to protect against power interruptions. It manages the switching of the outdoor fan motor, crankcase heater (CCH), and auxiliary heat outputs during the defrost state. For field testing, the board includes test pins to manually force a defrost cycle, allowing technicians to verify sensor accuracy and relay operation instantly.
Key Benefits for Contractors:- Direct OEM Compatibility: Engineered specifically for York, Coleman, and Luxaire 14 SEER equipment to maintain original factory sequence of operation.
- Optimized Efficiency: Demand-based logic prevents "ghost" defrost cycles, maintaining higher system SEER ratings in cold climates.
- Advanced Protection: Onboard circuitry manages low voltage detection (dropping out below 16 VAC) to protect contactors from chattering.
- Simplified Diagnostics: Flash codes provide immediate feedback on high-pressure switch trips or sensor failures.
- Rugged Build Quality: High-grade printed circuit board (PCB) designed to withstand the thermal cycling and moisture typical of outdoor condenser sections.
What does this board replace?
This is the official replacement defrost control for part numbers S1-031-03877-000 and S1-031-03498-000.
How do I test the defrost sequence on this board?
With a call for heat (Y energized), short the TEST terminals for more than six seconds. This bypasses the ASCD and forces the unit into defrost, de-energizing the outdoor fan and shifting the reversing valve.
Should I replace the sensor with the board?
It is standard service practice to replace the outdoor coil temperature sensor whenever installing a new defrost control board to ensure the logic receives accurate resistance data.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
York S1-031-03498-001 Control Board
The York S1-031-03498-001 Demand Defrost Control Board is a critical OEM replacement part engineered for high-efficiency 14 SEER heat pump systems. As a veteran-grade HVAC control board, it is the direct factory successor to the S1-031-03877-000, ensuring seamless integration with York TH4 series units, including models TH4B3622SA, TH4B4822SA, and TH4B6022SA. Unlike standard time-temperature defrost boards, this demand defrost module utilizes advanced logic to initiate cycles only when necessary—monitoring ambient temperature, coil temperature, and compressor run time—which prevents unnecessary energy waste and reduces mechanical wear on the reversing valve and compressor.
Built for the rigors of split system heat pumps, the S1-031-03498-001 features integrated diagnostic LEDs for rapid HVAC troubleshooting and a 5-minute anti-short cycle delay (ASCD) to protect against power interruptions. It manages the switching of the outdoor fan motor, crankcase heater (CCH), and auxiliary heat outputs during the defrost state. For field testing, the board includes test pins to manually force a defrost cycle, allowing technicians to verify sensor accuracy and relay operation instantly.
Key Benefits for Contractors:- Direct OEM Compatibility: Engineered specifically for York, Coleman, and Luxaire 14 SEER equipment to maintain original factory sequence of operation.
- Optimized Efficiency: Demand-based logic prevents "ghost" defrost cycles, maintaining higher system SEER ratings in cold climates.
- Advanced Protection: Onboard circuitry manages low voltage detection (dropping out below 16 VAC) to protect contactors from chattering.
- Simplified Diagnostics: Flash codes provide immediate feedback on high-pressure switch trips or sensor failures.
- Rugged Build Quality: High-grade printed circuit board (PCB) designed to withstand the thermal cycling and moisture typical of outdoor condenser sections.
What does this board replace?
This is the official replacement defrost control for part numbers S1-031-03877-000 and S1-031-03498-000.
How do I test the defrost sequence on this board?
With a call for heat (Y energized), short the TEST terminals for more than six seconds. This bypasses the ASCD and forces the unit into defrost, de-energizing the outdoor fan and shifting the reversing valve.
Should I replace the sensor with the board?
It is standard service practice to replace the outdoor coil temperature sensor whenever installing a new defrost control board to ensure the logic receives accurate resistance data.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The York S1-031-03498-001 Demand Defrost Control Board is a critical OEM replacement part engineered for high-efficiency 14 SEER heat pump systems. As a veteran-grade HVAC control board, it is the direct factory successor to the S1-031-03877-000, ensuring seamless integration with York TH4 series units, including models TH4B3622SA, TH4B4822SA, and TH4B6022SA. Unlike standard time-temperature defrost boards, this demand defrost module utilizes advanced logic to initiate cycles only when necessary—monitoring ambient temperature, coil temperature, and compressor run time—which prevents unnecessary energy waste and reduces mechanical wear on the reversing valve and compressor.
Built for the rigors of split system heat pumps, the S1-031-03498-001 features integrated diagnostic LEDs for rapid HVAC troubleshooting and a 5-minute anti-short cycle delay (ASCD) to protect against power interruptions. It manages the switching of the outdoor fan motor, crankcase heater (CCH), and auxiliary heat outputs during the defrost state. For field testing, the board includes test pins to manually force a defrost cycle, allowing technicians to verify sensor accuracy and relay operation instantly.
Key Benefits for Contractors:- Direct OEM Compatibility: Engineered specifically for York, Coleman, and Luxaire 14 SEER equipment to maintain original factory sequence of operation.
- Optimized Efficiency: Demand-based logic prevents "ghost" defrost cycles, maintaining higher system SEER ratings in cold climates.
- Advanced Protection: Onboard circuitry manages low voltage detection (dropping out below 16 VAC) to protect contactors from chattering.
- Simplified Diagnostics: Flash codes provide immediate feedback on high-pressure switch trips or sensor failures.
- Rugged Build Quality: High-grade printed circuit board (PCB) designed to withstand the thermal cycling and moisture typical of outdoor condenser sections.
What does this board replace?
This is the official replacement defrost control for part numbers S1-031-03877-000 and S1-031-03498-000.
How do I test the defrost sequence on this board?
With a call for heat (Y energized), short the TEST terminals for more than six seconds. This bypasses the ASCD and forces the unit into defrost, de-energizing the outdoor fan and shifting the reversing valve.
Should I replace the sensor with the board?
It is standard service practice to replace the outdoor coil temperature sensor whenever installing a new defrost control board to ensure the logic receives accurate resistance data.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
