Trane HTR15199 Crankcase Heater Unlike generic seals

Unlike generic seals

it must be cooled below 32°F using a freezing agent or ice bath to ensure it shows near-zero ohms

preventing the short-cycling and blower run-on issues common with aged or fouled sensors

Operating range: 40°F–85°F for precise comfort control

the "U" designation typically denotes universal retail packaging

Trane HTR15199 Crankcase Heater Unlike generic sealsThe Trane HTR15199 Crankcase Heater is a critical OEM replacement part designed to maintain thermal equilibrium within the compressor sump. Engineered for 460 480V industrial circuits, this 90 100W heater prevents the dangerous migration and condensation of liquid refrigerant into the crankcase oil during off cycles. By keeping the lubricant at a temperature higher than the coldest part of the system, the HTR15199 eliminates the risk of oil dilution