Description
The York S1-025-41101-000 is a belt-type crankcase heater engineered to protect refrigeration and HVAC compressors from refrigerant migration during off-cycle periods. By maintaining the compressor crankcase at an elevated temperature, this heater prevents liquid refrigerant from mixing with compressor oil — a leading cause of bearing wear, slugging, and premature compressor failure.
Key Specifications
- SKU: S1-025-41101-000
- Heater Type: Belt (Wrap-Around)
- Voltage: 480V
- Wattage: 70W
- Compatible Compressor Diameter: 19.36″ – 27.1″
- Lead Length: 16″
Product Features
- Belt-style design wraps securely around the compressor body for consistent, even heat distribution
- Wide diameter range (19.36″ to 27.1″) provides compatibility with a broad selection of compressor models
- 70-watt output delivers efficient crankcase warming without excessive energy draw
- Rated for 480-volt applications, suitable for commercial and light industrial HVAC systems
- 16″ lead wires allow flexible routing to nearby electrical connections
- Genuine York OEM replacement part for reliable, manufacturer-approved performance
Application
This crankcase heater is a genuine York OEM replacement component, ideal for use in commercial rooftop units, chillers, and other HVAC systems utilizing York compressors. Installing a crankcase heater is a best practice recommended by compressor manufacturers to extend equipment life, reduce service calls, and maintain system efficiency — especially in climates where ambient temperatures drop significantly during equipment off-cycles.
Why Use a Crankcase Heater?
- Prevents refrigerant migration into compressor oil during shutdown
- Reduces risk of compressor slugging on startup
- Extends compressor service life and protects warranty
- Minimizes costly unplanned downtime and emergency service calls







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