DUO 12,000 BTU Portable Air Conditioner (MAP14AS1TWT-C)

Id give this a day or two of running see if it goes away.

just got the Midea duo from Sam's about a week ago. running it in a 1940s house with no AC. it's a tad slow in actually cooling the space but it does eventually. You'll definitely feel it if you're in front of the vent.

I have this model, got it last year. Only really needed it for the summer months (June-early Sept) so haven't really been using it yet, but I just plugged it back in and started it to listen. I noticed that it *did* make a very slight high-pitched sound at start-up, but very quickly drowned out by the normal sound of it. I can just barely hear it too still, but I have to literally stick my head right next to the back of the unit to hear it. Doesn't seem nowhere near as pronounced as this video. I'd honestly return/exchange it for another unit if it doesn't seem to go away after like a day.

I ordered a refurb from Walmart a few weeks ago for $225 and it arrived like new https://www.walmart.com/ip/15245460485?sid=02142f3b-d972-4bae-af57-8db35407caeb&conditionGroupCode=2

Thanks for your response. The high pitched sound mine makes completely overshadows the fan sound on low setting and is still audible when the fan is on high even ~20' away and 2 days later. This does make it seem like my unit is defective compared to yours.

I have this unit and I came across this thread researching the same noise. It’s incredibly annoying and I am considering returning it to Costco but fear getting a replacement unit will have the same issue.

I have this exact same ac and I love it. I’m on summer two now with it. Mine doesn’t make that noise. You should return it. Dunno what the point of your post is. Just return it lol. The beauty of Costco.