Description
The York 025-45539-000 is a 120-Volt, 90-Watt crankcase heater engineered to protect compressor integrity in York HVAC systems. By maintaining oil temperature during off-cycles, this heater prevents refrigerant from migrating into the compressor crankcase — a leading cause of premature compressor failure, oil dilution, and slugging on startup.
Why Crankcase Heaters Matter
During compressor shutdown, refrigerant can dissolve into the crankcase oil, reducing lubrication effectiveness and causing liquid slugging when the unit restarts. Installing or replacing a crankcase heater is one of the most cost-effective ways to extend compressor life, reduce service calls, and protect system reliability — especially in low-ambient or seasonal-use applications.
Key Features
- OEM York replacement part — SKU 025-45539-000
- Operating voltage: 120V
- Power output: 90 Watts
- Prevents refrigerant migration into crankcase oil during off-cycles
- Reduces risk of compressor oil dilution and liquid slugging on startup
- Designed for direct OEM replacement in compatible York equipment
- Helps extend compressor service life and lower total cost of ownership
Application
This crankcase heater is intended as a genuine OEM replacement for compatible York residential and light commercial HVAC systems. Always verify compatibility with your specific York unit model before installation. Consult York equipment documentation or your distributor for approved applications.
Installation Notes
- Disconnect and lock out all power before servicing
- Ensure heater is fully seated against the compressor shell before energizing
- Allow adequate warm-up time (typically 4–8 hours) before compressor startup after extended shutdown periods
- Follow all applicable local codes and manufacturer guidelines







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