I had this exact (sounding) issue this weekend. Except mine was working most of the day, then when I came back from a quick trip to the tore is was making a faint noise and not running properly. I turned off the breaker to AC for 10 minutes or so. Went and drank a cold one, came back in and it worked. I'm not 100% sure if that's what fixed it but it worked for me.
Sent from my SM-G870W using Tapatalk
2013 Jayflight 25BHS Elite
TV: 2002 Chevrolet 1500HD Crew Cab 3.73 Gears