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Nordyne 1045845R Defrost Control Board

Rating:
5 5 4
4  Reviews Add Your Review
Special Price $152.51 Regular Price $175.39
In stock
SKU
1045845R
The Nordyne 1045845R Defrost Control Board is an electronic control component, used to control the defrost cycle of heat pump equipment in the HVAC system. It obtains input signals in the form of temperature sensors and system controls, which are processed by the board to decide when there is a buildup of frost on the outdoor coil, and a defrost cycle is necessary. Its circuitry switches on and off the reversing valve circuit and outdoor fan circuit to start and end the defrost process. It is connected to electrical terminals and connectors which coordinate communication between sensors, and operating components.
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HVAC Controls & Electrical, Control Boards & Modules
Manufacturer:
https://www.partshnc.com/media/catalog/product/1/0/1045845r_1.jpg

Specifications

  • Type: Defrost Board
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    Product Questions (2)
    Customer Questions
    What maintenance is required for the Nordyne 1045845R Defrost Control Board?

    Inspect the control board periodically for dust buildup, loose wiring, or signs of overheating. Ensure all electrical connections are secure and corrosion-free to maintain proper defrost cycle operation. Always disconnect power before servicing to prevent electrical shock and damage.

    What are common issues with the Nordyne 1045845R Defrost Control Board?

    • Failure to initiate defrost cycles.
    • Burnt or damaged components.
    • Loose or corroded electrical connections.
    • Intermittent system operation.

    Installation Steps

    Step1: Turn off power to the unit at the breaker and confirm it is fully disconnected.

    Step2: Remove the access panel and label or document all existing wire connections.

    Step3: Disconnect the wires and remove the old control board from its mounting bracket.

    Step4: Mount the new board securely and reconnect all wires to the correct terminals.

    Step5: Reinstall the panel, restore power, and test the defrost cycle for proper operation.