Vacuum seems to have a problem

Warm air is normal! If very hot so its able to burn your skin then that is not normal!

It seems it must be blowing out from somewhere. Try to figure out where by feeling for air blowing to try to determine where it's coming from and why.

Most vacuum cleaners have more than one filter (even bag-less vacuums sometimes). I have found that after being used a while the motor filter blocks up. I just remove it and use another vacuum to clean it out. Depending on the material you may be able to wash it in warm water or if you can get your hands on a new one just replace it. I found a link on youtube that may help you to locate and replace the filters: http://www.youtube.com/watch?v=wGsuVK8KTT0

Check filter. Clean if needed. The filter should be cleaned when it appears dirty. Simply remove filter, rinse thoroughly under warm running water until clear, then allow to thoroughly air dry. The drying is very important. Additional filter cleaning instructions are on page 13 of the manual.
Check the pleated exhaust (HEPA) filter. If dirty, cleaning is necessary. Instructions for removal and cleaning are on page 14 of the manual.
Check hose, wands, and power nozzle for blockages.
Hose: detach at both ends. The ends of the hose are the most common areas for a blockage. Check visually and clear as much as possible if present. If not visible, hold one end up and drop a coin in. Lift the end until the coin falls through. If it doesn't, there's a clog.
The easiest way to unclog a hose is to use an air pressure hose, or a canister vacuum that has an exhaust blower that the hose can be held too. If enough pressure, it will blow the dirt out. Make sure to put a plastic bag around the loose end to hold the dirt.
Visually check wands and power nozzle. The bend in the power nozzle connection is another common place for clogs. A wooden spoon handle, or similar blunt object, can be used to push the debris back toward the brush to clear a blockage here.

If none of these are the problem, contact a vacuum service center, preferably Hoover, for assistance.

Manual:
http://www.hoover.com/pdfs/manuals/S3865.pdf

Thank you for providing the brand and model info. It helps a lot.

remove the bottom cover and check the drive belt.if belt is ok then your brush motor could be bad.

Take to Walmart, plug it in and start to vacuum THEIR floors!
Try removing the dust container and look for anything blocking airflow including the HEPA filter. Make sure the dust cup has a seal where it joins the vacuum. The fix is probably simple, but it shouldn't be up to you to do so!

Ya, you need to replace your belt. You can get this belt here:

Hoover Widepath Tempo Belt

lots of times switching to hard surface floors you need to slow down because the air flow that does the actual picking up of the dirt can't work as fast as the spinning brush so the brush is throwing the dirt out the back before the suction can pick it up. Try slowing down

Definitely not. Do not use water or any liquids to clean it. Te normal use life is 2-3 years keeping it maintained. You can clean it dry with the dust brush from your vac attachments. place in a plastic bag and tap it some folks even us an air compressor to blow out the impacted dirt. you will only want to use the Hoover brand, other generic brands dont fit as well.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

You will have to replace the tank, and it will come with the soap dispenser attached.