I have a brand new shark navigator. It is smelling like it is burning and the bottom is so hot that you cannot touch it. It makes a sound like a bearing went out like a jet engine sound. I love this machine - what do I do?

They are all called 'Navigator' :>D
https://www.google.com/search?q=Shark+Navigator

When switch to carpet, the difference is that the brush roller turns. When it is on hard floors setting it doesn't. Remove the base plate, remove the brush and the belt. There is likely something wrapped around the drive spindle or clutch.

How to reduce high pitch noise of Shark vacuums

Digital Trends https://www.digitaltrends.com > Smart Home > Guides
Apr 6, 2022 - You can adjust the height on a Shark vac to accommodate certain levels of rugs, carpet, etc. If the vac has been set too high for the current ...

Loud rotating carpet brush noise: Just got my new Shark

Fixya https://www.fixya.com > support > t15932203-loud_r...
It seems that your drive belt for the beater brush is stretched. This is a common problem -- if you flip the vacuum over so you are looking at the bottom, you ...

4 Reasons Why Shark Vacuum Is Making Noise

howtofixit.net https://howtofixit.net > shark-vacuum-making-noise
Aug 20, 2021 - Another cause behind the loud noises coming from your Shark vacuum is an overly dirty or damaged filter. Remember: air must be able to pass ...

‎Loud Or High Pitch Noise · ‎Blockages · ‎Rattling Noise · ‎Belt Snapped In Powerhead

Does anyone know why my vacuum might be making a ...

Reddit · r/VacuumCleaners 10+ comments · 2 years ago I agree, suction relief valve is popping because of a blockage. Check the extension wand too. The air goes from floor head, lower hose, ...

6 answers · Top answer: That's the suction relief valve. There is a blockage somewhere in the system, either in the ...
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I am guessing that the motor has died on you and has stopped working and needs to be replaced. These types of vacuum cleaners last about 5 years and if you had it for 4 years and this problem is occurring then it is most likely a faulty vacuum cleaner here that you could of had purchased and you should buy a new vacuum cleaner. Costco sells shark rocket vacuum cleaners.

Brand Developers has recently discovered an issue where the cord may cause a burn or electric shock. Only the Shark Navigator Lift-Away (NV350) units manufactured prior to 18th October, 2014 (which bear a batch code 4811A to 4114A inclusive) are affected. Hope this helps.

vacuum hose blocked preventing air flow

Motor is jammed or burnt out,is there a burning electrical smell?,if there is,and the belt on the motor turns freely by hand , then the motor is burnt out.

It turns on ,but smells like it burning, I replaced the belt and filter, and took every piece apart and cleaned it, spotless

Plugged in:
Try moving the cord around at the strain relief, where cord enters the vac, as internal wires may have broken.
Unplugged:
Check brushes of electric motor, they may be worn down.
Unplugged:
Check main switch continuity with a meter on ohms or buzzer.
Limits:
No.
But there could be a thermal fuse either in or on the motor, to avoid overheating damage and smoke signals!

sounds to me there's a blockage somewhere .the link below is the manual it will show you where to look for blockages..
http://www.totalvac.com/manuals/Shark_Navigator_Infinity_Owners_Guide.pdf

That means that the belt is stretched and it is slipping on the motor shaft, that is why it is hot and smells like burning rubber. You need to replace the belt. Here is the correct belt you need:

Hoover Windtunnel Canister Belt