I was gonna say, I've watched a lot of Shark Shows on Disney Plus, and not one of them mentioned whistling! :)

Hmmmm, i have a new one but am getting hard of hearing! so who knows if mine whistles?

Baby shark, do do do do do do....

Dunster -- take it back, f'sure.

Earworm alert!!! Noooooooo..... 🤣

Went through months of baby shark with my pre toddler grandson. Over and over, You tube has it on a loop. LOL Now he is three and into Curious George.

Dunster, I hope you return or exchange your new vacuum and try another on Shark. I have two Shark vacuums that work really well and are not excessively noisy. I would ignore whatever that supposed customer service person said. It doesn't matter. Just deal with Costco. I did buy a refurbished different major brand that made a terrible high pitched noise before I found my Shark. It drove my dog crazy. I kept trying to use it because I believed the hype about that brand, before finally giving up. Good luck!

[QUOTE=dunster;8566923]I just got delivery of a Shark upright vacuum, a UV850 from Costco.

Take it back, it is a motor issue, not a suction noise.

If you don't like it take it back. It doesn't matter if it whistles or not, it's annoying.

I've learned there are some advantages to being hard of hearing lol

I too thought sharks whistling? What? But I have 2 Shark vacuums also, and I love them. I would say take it back for refund or exchange. Good luck on either chose.