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Bard part number 8605-019 is an OEM 240V wrap-around crankcase heater used on select Bard wall-mount HVAC systems to warm the compressor crankcase during low ambient conditions. By keeping the oil at a stable temperature, it helps reduce refrigerant migration into the oil and supports proper oil viscosity at start-up, which can reduce wear and nuisance trips after cold soak. This is a direct replacement heater intended to be installed around the compressor crankcase, so confirm voltage and unit compatibility by model and serial before ordering to ensure correct fit and operation.