The Trane CNT08175 Defrost Control Board is an electronic component designed to manage the defrost cycle in compatible Trane heat pump systems. It monitors operating conditions and activates the defrost sequence when necessary, helping remove frost buildup from the outdoor coil and maintain efficient heat transfer. This control board supports reliable heating performance during cold w... https://www.partshnc.com/trane-cnt08175-defrost-control-board