The York S1-02533474480 Crankcase Heater Band is a 90W, 480V heating element designed for HVAC compressors with a 28.7–35.7-inch diameter. It wraps around the compressor crankcase and provides controlled heat to help prevent refrigerant migration into the compressor oil during off cycles. This heater is commonly used in compatible York HVAC systems, including air conditioning units an... https://www.partshnc.com/york-s1-02533474480-crankcase-heater-band-28-7-35-7-dia-90w-480v