16v38 Defrost Control Board for Lennox 100269-08

Upgrade your HVAC system's reliability with the 16v38 Upgraded Defrost Control Board, a precision-engineered replacement designed for Lennox 100269-08 and compatible heat pump units from Armstrong, Allied Air, Concord, and Ducane. This advanced control board manages critical defrost cycles and HVAC functions, ensuring consistent performance and energy efficiency. By replacing older series part numbers such as 100269-01 through 100269-08, this unit provides a seamless transition to a more robust control system without requiring complex rewiring or system modifications.

The 16v38 board features intelligent defrost management with an adjustable timer set to 30, 60, or 90-minute intervals, defaulting to 90 minutes for optimal efficiency. The defrost cycle initiates at 42°F and concludes at 70°F, with a maximum defrost duration of 14 minutes to prevent unnecessary energy consumption. Integrated safety mechanisms include a five-minute anti-short cycle to protect the compressor and a pressure switch that locks after five trips, which can be reset by cycling power or shorting the TEST pins. Additionally, a low-pressure switch auto-bypasses below 15°F to eliminate false alarms during extreme cold.

Designed for durability in harsh winter conditions, this control board is moisture-proof, dust-proof, and temperature-stable, ensuring year-round heating reliability. For ease of maintenance, the unit includes dual LED indicators that display status through specific flash patterns. A one-key testing mode allows technicians to force a defrost cycle instantly by shorting the TEST pins for two seconds, facilitating quick diagnostics. The lightweight design ensures easy installation, making it an ideal choice for homeowners and professionals seeking a dependable upgrade for their heat pump systems.