Description
The Tecumseh K31-9 is a 27-watt insert-style crankcase heater engineered to protect refrigeration and air conditioning compressors from refrigerant migration and oil dilution during off-cycle periods. By maintaining the crankcase at an elevated temperature, this heater helps prevent liquid refrigerant from accumulating in the compressor oil, reducing the risk of slugging, bearing wear, and premature compressor failure at startup.
Key Features
- 27-watt insert-style crankcase heater
- Genuine Tecumseh OEM replacement part (SKU: K31-9)
- Insert design for direct installation into the compressor crankcase
- Helps prevent refrigerant migration and oil dilution during off cycles
- Reduces risk of compressor slugging and premature wear
- Compatible with Tecumseh compressor applications
Why Use a Crankcase Heater?
During extended off-cycles — especially in cold ambient conditions — refrigerant can migrate into the compressor crankcase and mix with the lubricating oil. When the compressor restarts, this refrigerant-oil mixture can cause liquid slugging, which damages valves, pistons, and bearings. A crankcase heater eliminates this risk by keeping the crankcase warm, ensuring the oil remains free of refrigerant and the compressor starts cleanly every time.
Application
- Residential and light commercial refrigeration systems
- Air conditioning compressors
- Heat pump systems
- Any Tecumseh compressor application requiring crankcase protection
Installation Notes
Always de-energize the system before installing or replacing a crankcase heater. Verify compatibility with your specific Tecumseh compressor model prior to installation. The insert style mounts directly into the crankcase well for secure, efficient heat transfer.
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