Hoover steam vac model f7425-900 filter is

The brushes turn by the airflow from the vacuum suction turning a turbine motor to spin the brushes. First try to spin the brushes by hand. If they won't turn it usually means the brushes are clogged with hair and debris or need replaced or the turbine could be seized up. If the brushes won't spin reach under the brushes and push the little tabs and remove the brush block asssembly from the machine. If the brushes spin freely after you remove them from the machine then that means that most likely the turbine is seized and will need to be repaced. If the turbine is not seized you may simply just have a clogged filter screen. Most steam vacs have a red screen filter either on top or underneath the machine. On the top it is under a little clear plastic cover that you have to pry off before you can pull the screen out to clean it. If it's underneath you can pull it out and clean it.

the belt is broken.

Since the Steam Vac does not have any belts... the logical issue is Switch setting (Hi, Low, Off) on the base cover. The only other is dirt collection on the air intake for the brushes (unit uses air passing over plastic fan blades to spin the brushes). To clear the dirt problem, remove the clear plastic cover located just in front of the brush Switch. You can now use your finger nail (or an old tooth brush) to clean the filter screen located just below the Switch. Don't tear it, just gently remove the accumulated dust/hair.
Brushes should spin once you reassemble and power it up!!

Check to see if the shaft on the brush block hasn't broken off. Otherwise it is the turbine that drives the brushes and is either clogged up inside or needs to be replaced.

Take out the brush block, make sure that the shaft is ok, it goes up into the turbine, which is what drives the brushes. If the shaft is ok, then the turbine either needs to be cleaned and lubed, or replaced.

Did you clean both filters? There is one on the tank and the other is from the bottom, it ha a red frame, pull it out to clean. Pull the brush block out, is the shaft that goes up into the machine broken off? If so replace the brush block. While it is out, trn the machine on and see if the square hole up where the brush block goes, is turning. If not then the turbine has gone bad. You can sometimes clean the turbine out, otherwise replacing it may be the best option.

If this is a Hoover Steam vac, the turbine which drives the brushes is bad. If not a Hoover, then what is it, they are different, need brand and model number.

The brushs are driven by a turbine, if not turning, it may be bad. You can take it apart and try to clean it out, or just replace it. Also pull out the brush block and see if the shaft that goes up into the turbine is broken off, itis broke, then replace the brush block.

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Generic problem for all Vacuums
Brushes do not rotate on
posted by marshad on May 02, 2008
brushes do not rotate on Hoover steam-vac upright

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure.
This also happened to my own Hoover Steam Vac and there was a broken part that connected to the brush assm that I had to replace, it has been a while but once they replaced the part everything worked just fine and it was not that expensive and I am still using the vacuum still to date and it is working just fine. I believe it was something like the switch for the brushes on/off switch or the part was part of the handle assm. Check you owner’s manual for the exploded view on the vacuum or also check with your local vac dealer. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions.
http://www.hoover.com Telephone
Contact our Customer Service Department at 1.330.499.9499
Monday through Friday
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Don – The Vac Man
Go Ahead. Use Us.

This happens when the filter on the inside of the lid for the dirty water tank is pushed all of the way up. You need to leave a 1/4 in. gap from the top to the top of the filter.