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Lennox 16V38 Defrost Control Board

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$0.00
In stock
SKU
16V38
The Lennox 16V38 Defrost Control Board serves as an essential part of HVAC systems it provides regulatory functions for heating pumps and air conditioning units. The control board operates through time and temperature-based controls to minimize ice formation on outdoor coils. This control board integrates defrost relays with anti-short cycle timed-off controls and high and low-pressure switch system controls to improve HVAC system efficiency. The board works by obtaining data from sensors which helps it decide when to run defrost cycles. The system enables compressor shutdown for 30 seconds during defrost cycle initiation and termination protecting equipment from short cycling damage.
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HVAC Controls & Electrical, Control Boards & Modules
Manufacturer:
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Specifications

  • Type: Defrost
    Manufacturer Name: Lennox
    Product Number: 16V38
    OEM Part Number: 16V38
    Product Description: Defrost Board Control
    Weight:0.5lbs/226.8g

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    Product Questions (2)
    Customer Questions
    What maintenance is required for the Lennox 16V38 Defrost Control Board?

    Inspect the control board periodically for loose wiring, corrosion, or heat discoloration that could affect the accuracy. Keep the electrical enclosure clean and dry to prevent moisture damage. Verify proper defrost cycle operation during seasonal checks, and always disconnect power before servicing to ensure safety.

    What are common issues with the Lennox 16V38 Defrost Control Board?

    • Failure to initiate or terminate defrost cycles correctly.
    • Loss of output to compressor or contactor circuits.
    • Erratic operation due to sensor or wiring faults.
    • Board failure from voltage spikes, moisture, or overheating.

    Installation Steps

    Step 1: Turn off electrical power to the HVAC system and confirm full shutdown.

    Step 2: Open the control compartment and note all wiring connections carefully.

    Step 3: Disconnect all harnesses from the existing defrost board.

    Step 4: Remove mounting screws and take out the old board.

    Step 5: Place the new board in the same position and secure it firmly.

    Step 6: Reconnect all wires exactly as noted during removal.

    Step 7: Close panel, restore power, and check defrost cycle operation during system startup.