Industrial 21C140501G60 CNT05875 Defrost Control Board

The Trane American Standard CNT05875 21C140501G60 RECIP Defrost Control Board is a printed circuit defrost control module used in heat pump systems to manage defrost cycles, monitor sensors, and coordinate outdoor unit operation for reliable heating performance. Designed for OEM replacement in Trane and American Standard residential and light commercial heat pumps, it controls defrost timing, compressor operation, reversing valve, and outdoor fan. Key identifiers include Manufacturer Part Number CNT05875 and Alternate Part Number 21C140501G60, with the product type RECIP Defrost Control Board from Trane/American Standard. The board measures 3 by 3 inches, mounts internally, and is compatible with residential and light commercial heat pump systems, rooftop units, and climate control equipment; common replacements include CNT05008, X13690250600, and 21C140501G60.