Image 1 of 1 Trane CNT01642 Defrost Control Board $0.00 The CNT01642 is an OEM Trane defrost control board used in HVAC systems, specifically for single-stage heat pumps and central air conditioners Added! The CNT01642 is an OEM Trane defrost control board used in HVAC systems, specifically for single-stage heat pumps and central air conditioners