Description
Lennox 12U71 Crankcase Heater — 40W, 240V
The Lennox 12U71 is a genuine OEM crankcase heater engineered to protect refrigerant compressors from the damaging effects of refrigerant migration during off-cycle periods. By maintaining the compressor crankcase at an elevated temperature, this heater prevents liquid refrigerant from accumulating in the oil, ensuring reliable startups and extending compressor service life.
Key Features
- Genuine Lennox OEM replacement part (SKU: 12U71)
- Rated wattage: 40 watts
- Operating voltage: 240 volts
- Prevents refrigerant migration into compressor oil during off cycles
- Helps reduce compressor wear and premature failure
- Direct OEM fit for compatible Lennox equipment
Why Use a Crankcase Heater?
During extended off-cycle periods — especially in cold ambient conditions — refrigerant can migrate into the compressor crankcase and dilute the lubricating oil. When the compressor restarts, this refrigerant-oil mixture can cause slugging, oil foaming, and accelerated wear. A properly functioning crankcase heater eliminates this risk by keeping the oil warm and refrigerant-free, protecting your investment and maintaining system efficiency.
Application
- Designed for use with compatible Lennox air conditioning and heat pump systems
- Ideal for replacement in residential and light commercial HVAC applications
- Consult Lennox equipment documentation to confirm compatibility before installation
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