Universal Compatibility: Engineered as a direct OEM replacement for various Armstrong

This specific configuration features a 1" NPT connection

the 100146605 is the current manufacturer-approved part number that replaces the older GKT3700 design for improved sealing reliability

the issue may stem from lead wire continuity or the control board's logic processor

Built with heavy-duty

Copeland 030-0186-01 Sleeve 322838-752 Universal Compatibility: Engineered as aThe Copeland 030 0186 01 Heater Sleeve is a critical 1 2 inch NPT component engineered for semi hermetic compressors, including 4D, 4R, 6D, 6R, and 6T series models. Designed to facilitate superior heat transfer from the crankcase heater to the oil reservoir, this sleeve ensures the compressor oil remains at the proper viscosity during off cycles. By maintaining elevated crankcase temperatures, this OEM Copeland part effectively prevents refrigerant