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The Bard 8605-018 crankcase heater is an OEM wraparound, 460V compressor accessory used on select Bard wall mounted HVAC units to keep compressor oil warm during off cycles, which helps reduce refrigerant migration and supports smoother, more reliable starts in colder conditions. This heater strap installs around the compressor crankcase and is a direct replacement for the original Bard specified component, making it a smart choice when troubleshooting nuisance trips, hard starting, or compressor protection issues tied to low ambient operation. Confirm voltage and unit model compatibility before ordering, and replace any damaged wiring or terminals during installation to ensure proper heater operation.