My dirt devil upright dynamite vacuum does not pick up when i vacuum the carpet but the hose has good suction when I use the tools...what is wrong with it..

I have a Dyson and was having a similar problem some time back. I found out these bagless systems still have a filter that picks up the fine dust to keep it contained. Find out where yours is located and beat the dust out of it really good or just replace it.
Hope this helps.

Hi,
Here is a tip that I wrote about my Bissel but I bet you have the same problem and the hose is clogged...

Bissell Bagless Upright Vacuum not working
http://www.fixya.com/support/r4387950-bissell_bagless_upright_vacuum_not

heatman101

A few weeks ago I ran into the same problem, virtually no suction. First I replaced the bad belt (make sure you fit it right or it'll destroy the belt, luckily I bought 2!) and while the vacuum sounded more "alive" it didn't seem to pick up anything any better. The final solution was taking apart the entire intake port section down to the motor and getting the collection tube. It was filled with junk all the way up. I spent over an hour clearing out gunk and animal fur throughout the tubing. Putting it back together was a cinche because the entire vacuum uses one screw type universally. The whole process was pretty intuitive and its clear it's meant to be taken apart for just this purpose.

You must remove the bottom plate for access to the belt area. You may have clogged the dirt path ... as long as the bottom is removed, clean the dirt path (hose and fittings)

does the unit have a belt?

If there no blockages in the hoses, then the next thing to check would be any filters in the vacuum. When these get clogged, you will experience this problem.

Dave

There is probably a second or third filter (besides the canister) that needs to be cleaned.
I doubt that it's rotating the wrong direction.

I figured out how last night.
Take a screw driver and unscrew the screw on the top of hose and take the hose out and take a pen or something long enough with grip to get all of the junk out.

The circulation still isn't as strong though.

check the filter gauze on the unsud of vack where bag is if this is blocke you will not have vacuum as there will not be ventilation thro this filter should be able to feel blow of air from this vent when vacuuming up hope this helps good luck from uk !

Yep check the hose at the back as it may well be clogged. Also undo the soleplate/floorhead and have a look up the dirt channel behind the floor brush. Either that take off the main bin and check the dust channel leading down to the hose.