Lennox P/N 100269-08 – Genuine OEM Heat Pump Defrost Control Board 16V38

The Lennox 100269-08 is a Genuine Original Equipment Manufacturer (OEM) defrost control board designed for precise management of the defrost cycle in Lennox, Armstrong, and Ducane residential heat pump systems. This microprocessor-based control is responsible for monitoring the outdoor coil temperature and compressor run time to determine when ice buildup needs to be removed. By efficiently switching the unit from heat pump mode to air conditioning mode (reversing the refrigerant flow) and activating supplemental heat, it ensures the outdoor coil remains clear for optimal heat transfer.

As an authentic OEM component (Catalog Number 16V38), the 100269-08 features factory-programmed timing intervals (typically selectable at 30, 60, or 90 minutes) and specific sensor calibrations required for your unit's safety and efficiency. Replacing a failed board with a genuine Lennox part ensures the defrost termination temperature is reached accurately, preventing unnecessary energy waste or "freeze-up" conditions that can lead to expensive compressor damage.

Key Features and Function:

• Demand & Timed Defrost: Manages the essential transition between heating and defrost modes based on factory-set logic.
• Genuine OEM Reliability: Official Lennox replacement engineered for exact electrical compatibility and mounting hole alignment.
• Diagnostic LED Indicators: Features built-in status lights to assist technicians in identifying sensor faults or board errors.
• Integrated Reversing Valve Control: Coordinates the reversing valve and outdoor fan motor operation during the defrost sequence.

Product Details and Key Specifications:

• Part Number: 100269-08
• Catalog #: 16V38
• Manufacturer: Lennox
• Part Type: Defrost Control Board
• Input Voltage: 24 VAC
• Frequency: 50/60 Hz
• Timing Intervals: Field-selectable (30, 60, 90 minutes)
• Connections: Standard spade terminals and multi-pin harness headers
• Gross Shipping Weight: 0.8 LB

🛠️ HVAC Depot Pro Tip: The "Sensor" Trap

Before replacing your 100269-08 defrost board, always test the outdoor coil thermistor (sensor). A very common "false failure" occurs when a sensor goes out of calibration or has a frayed wire, telling the board the coil is freezing when it isn't, or vice-versa. Use a multimeter to check the resistance (ohms) of the sensor against the manufacturer's temperature-resistance chart. If the sensor is bad, the new board won't fix the problem. Additionally, check for "chattered" contactor points, as electrical noise can sometimes scramble the logic on these sensitive microprocessors.

Cross-Reference:

The 100269-08 is a direct OEM replacement for the following part numbers:

• OEM & Catalog Numbers: 100269-08, 16V38, 59W38, 10026908, 59W3801.
• Manufacturer Cross: Hamilton Standard / Lennox 100269 Series.

Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:

• Lennox Elite & Merit Series (Specific Models):
• 13HPX-024-230-01, 13HPX-030-230-01, 13HPX-036-230-01
• 14HPX-024-230-01, 14HPX-030-230-01, 14HPX-036-230-01
• XP13-024-230-01, XP13-030-230-01, XP13-036-230-01
• Also compatible with corresponding Armstrong Air and Ducane models.