The DC inverter rotary compressor (11103020009159) is a genuine Midea part for your smart inverter portable AC and window air conditioners such as the 12,000 BTU window air conditioner. If your air conditioning unit is not cooling efficiently, making unusual noises, or failing to start, it may be due to a faulty compressor. Replacing the compressor can restore your appliance's cooling performance. Confirm your device's model number for compatibility before purchasing.