Manufacturer Name: Trane Product Number: CNT08177 OEM Part Number: CNT08177 Product Description: Defrost Board Weight:0.4lbs/181.44g The Trane CNT08177 Defrost Board is a key component in HVAC systems, responsible for controlling the defrost cycle of heat pumps. It ensures efficient operation by preventing ice buildup on the coils, enhancing system performance and longevity. https://www.partshnc.com/cnt08177-trane-defrost-board