The contact owns a 2019 Heartland Mallard M27 RV equipped with a Dometic AC unit, Manufacturer number: B57915.711J0, Serial number: 73826296, and Product number: 936002207. The contact stated while he was asleep, he started to smell a burning odor entering through the AC vents. The contact stated he turned off the AC unit and the power. The contact was able to continue sleeping and the odor went away. The contact stated no one was injured or sought medical attention. The contact stated that the electrical wire connectors to the compressor on the AC unit were melted. The contact stated that an independent mechanic came to the RV and replaced the AC unit. The manufacturer had been informed of the failure. The VIN was not available.