1035831R Nordyne Defrost Control Board
1035831R Nordyne Defrost Control Board
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Product Overview
The 1035831R Nordyne Defrost Control Board is a high‑quality OEM replacement designed for reliable frost management in Nordyne heat pump systems. This control board monitors coil temperature, manages compressor operation, and initiates defrost cycles to maintain peak system efficiency in cold‑weather conditions. Built on a rigid PCB with advanced configuration features, it ensures accurate timing, dependable performance, and long‑term durability. Ideal for service technicians and homeowners needing a direct replacement for failed or intermittent defrost control functions. Replaces legacy part numbers including 1016567R and 1045845R.
OEM Cross 1016567R to exact board 1035831R
Cross-Reference Part Numbers
| OEM Part Number | Replaces |
|---|---|
| 1035831R | 1016567R, 1041354R |
Both boards fit the same Nordyne / Intertherm / Miller heat pump families.
If a unit calls for 1045845R, the correct replacement is 1035831R.
If a unit calls for 1035831R, do not go backwards to 1045845R unless absolutely necessary.
Compatibility
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Fits Nordyne and Intertherm heat pump units that originally used the 1035831R defrost board
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Consult your OEM parts manual for exact model fitment
Technician Notes
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Always wear an ESD wrist strap and handle the board by its edges.
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Verify dip-switch and jumper settings match your outdoor temperature sensor calibration requirements.
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Test the defrost thermistor: expect ~12 kΩ at 32 °F and ~5 kΩ at 77 °F.
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Inspect the outdoor coil sensor, termination thermostat, and wiring connectors for corrosion or damage.
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Confirm 24 VAC control voltage between R and C terminals before and after installation.
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Use the on-board LED blink codes to diagnose faults—refer to the OEM service manual for code definitions.
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Photograph the original wiring layout and board orientation to ensure accurate reinstallation.
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After replacement, run the system through a full defrost cycle in heating mode to verify operation.
Additional Resources
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Download the OEM wiring diagram and installation manual (PDF)
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Access a printable defrost board cross-reference cheat sheet
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Watch our step-by-step video guide on replacing the defrost control board
Replaced by 1035831R