Doesn't return the dirty water to the tank, after apply the water

There has to be a leak in the suction somewhere. Inspect the nozzle, tank, etc to see if you can find it.

Is it a carpet cleaner? If so, you should have dirty water (vacuumed from the carpet) in the recovery tank.
Most carpet cleaners have a transparent vacuum intake so you can see the dirty water going in as you pull back on the return sweep. Check for clogs or a broken belt. I advise against using you cleaner until the water pickup is repaired. Leaving water in the underlayment can cause mold,mildew and rotten floorboards.
I hope this helps. Good Luck!

check the seal

The most common reason for lack of pick up on the F5000 series is that the lid is not fully seated on the dirty water tank. Be sure to hook the two tabs on the front of the lid, and then snap the rear latch into place. Another reason is that the duct on the front of the dirty water tank is missing. The duct may have been removed to install the hose, and was not put back in place. It is a square plastic piece, about the size of a slice of sandwich bread, which slides into the front of the tank. A far less common reason for no pick-up is that the seal that the tank sits on has fallen off the motor cover suction tube. You will see a round tube on the bottom of the dirty water tank. This sits on top of a large rubber seal on the motor cover when the tank is in place. Be sure the seal has not fallen down into the hood.

Another reason for no pick up is that the duct on the front of the dirty water tank is missing. The duct may have been removed to install the hose, and was not put back in place. It is a square plastic piece, about the size of a slice of sandwich bread, which slides into the front of the tank. A far less common reason for no pick-up is that the seal that the tank sits on has fallen off the motor cover suction tube. You will see a round tube on the bottom of the dirty water tank. This sits on top of a large rubber seal on the motor cover when the tank is in place. Be sure the seal has not fallen down into the hood.

The most common reason for lack of pick up is that the lid is not fully seated on the dirty water tank. Be sure to hook the two tabs on the front of the lid, and then snap the rear latch into place. Another reason is that the duct on the front of the dirty water tank is missing. The duct may have been removed to install the hose, and was not put back in place. It is a square plastic piece, about the size of a slice of sandwich bread, which slides into the front of the tank. A far less common reason for no pick-up is that the seal that the tank sits on has fallen off the motor cover suction tube. You will see a round tube on the bottom of the dirty water tank. This sits on top of a large rubber seal on the motor cover when the tank is in place. Be sure the seal has not fallen down into the hood. This applies to the F5800 and F5900 series SteamVacs.

ok 3 things to check before re-boxing it up.

1) make sure that the lid is on properly. it should go on with the 2 tabs at the front of the machine, then click into place at the back of the machine.

2) when you emptied it, sometimes the dirt channel will fall out. This allows for the suction to go between the dirty tank and the clear channel for the water to be sucked back up.

3) when you remove the dirty water tank again, look down inside the machine for a circular hole. there should be a rubber gasket on it to seal up the tank for your suction. If it has come loose or is missing, retrace your steps between the machine where it was last used and the sink or wherever you dumped out the dirty water.

Good luck,
Mark

It sounds to me like you have the water hose plugged in, but not the hose block. In the front of the dirty water return tank there should be a removable square plastic piece. Remove the lid and slide that piece out. Replace wth the back end of the hose receptacle. If you have already done this, then here is your problem: when you return the lid to the top of the return tank, you must roll it on from the front(there are brackets the lid hooks under) to the back and listen or feel or the "click" your tank is now ready to pick up the dirty water from your hose. let me know if this helps!

Make sure that that the lid for the dirty water tank is locked on to the bucket, the other is make sure that the filter on the inside of the lid is not all the way up, needs to be a gap 1/4 inch or so.