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Bard CMC-38 is an OEM crankcase heater kit designed for 230V single-phase Bard wall-mount air conditioners. This kit helps keep the compressor crankcase warm during off cycles and cooler outdoor conditions, which reduces oil dilution and refrigerant migration that can contribute to noisy starts and premature compressor wear. CMC-38 is specified in Bard literature as a field-installed accessory for applicable models, making it a dependable choice when you are restoring a factory-correct setup or replacing a failed heater to protect compressor reliability. Verify your unit model and electrical rating before ordering, since crankcase heater kits are voltage and phase specific.