Nordyne 1045845R Defrost Circuit Board

Nordyne / Miller / Nortek 1045845R Defrost Control Board | OEM

The Nordyne 1045845R is a genuine factory-authorized defrost control board engineered for Nortek Global HVAC heat pump systems. As an Original Equipment Manufacturer (OEM) component, it serves as the primary logic module for managing the outdoor unit's defrost cycle, preventing ice accumulation on the coils during the heating season.

This board is the current consolidated replacement for multiple legacy modules, featuring a standardized pin layout that allows for a direct "drop-in" installation on most Nordyne-manufactured outdoor condensing units.

Compatibility & Cross-Reference

The 1045845R is the manufacturer-designated successor for several discontinued and obsolete part numbers:

  • Directly Replaces P/Ns: 1035831R, 1016567R, 624813R, 624813, and 1041354R.
  • Equipment Series: Primarily used in Nordyne, Miller, and Intertherm heat pump units.
  • Broad Brand Support: Compatible with heat pumps branded as Gibson, Frigidaire, Westinghouse, Philco, Tappan, and Maytag.

Technical Specifications

FeatureDetail
Part Number1045845R
Voltage24 VAC
Timing IntervalsSelectable 30, 60, or 90 Minutes
Logic TypeTime-Temperature Defrost
DiagnosticsOn-board LED Status Indicators

Why Choose a Genuine Nortek OEM Board?

  • Configurable Timing: Features selectable jumpers that allow you to set defrost intervals to 30, 60, or 90 minutes, ensuring the system is tuned correctly for your local climate.
  • Rapid Diagnostics: Equipped with LED status indicators that provide immediate feedback on system operation and fault codes, reducing troubleshooting time.
  • Integrated Test Mode: Includes "Speed-Up" terminals that allow technicians to force a manual defrost cycle to verify the reversing valve and auxiliary heat functions.
  • System Protection: Designed with advanced circuitry to manage the transition between heating and defrost modes, protecting the compressor from liquid slugging.

Shipping & Order Details

  • Continental US Shipping: We offer reliable shipping rates for all orders delivered within the Continental United States.
  • Authenticity: This is a brand-new, genuine Nortek-Nordyne part in original factory packaging.

Pro-Tip: A failing defrost board can be caused by a faulty outdoor coil defrost sensor, It is recommended that they are replaced at the same time to ensure the system operates as intended. If you need help finding the correct replacement Defrost Sensor (Thermistor) for your specific Nordyne or Miller heat pump or condensing AC unit, please give us a call on 877-821-8770.

$179.00

Add to Cart:
  • Model: 1045845R
  • Manufactured by: Nordyne
Ask a Question

Manufacturer Info