Hoover U5721-900 WindTunnel Upright Vacuum\015 The hose has no suction and the vacuum shuts down after a few minutes use.\015

How to Identify and Fix Common Vacuum Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced Vacuum Technicians :

Check for a plugged hose:

Plugged vacuum hoses are sometimes the reason for a loss in suction. Hoses can get clogged with hair, dust bunnies, string, or anything else that can`t pass through the other end of the hose. Airways inside the machine should be looked at as well. Wherever there is an air passage, check it.

Suction hoses, sometimes called `hard suction hoses`, are a semi-rigid hose, often made from a flexible PVC that encases a rigid PVC helix. They operate under negative pressures, which means that a suction hose draws water from an unpressurised (or static) water source. This is known as a drafting operation.
One of the easiest ways to increase vacuum cleaner suction is to empty the dust bag or container. Dust containers need to have enough space for airflow, otherwise, they could get clogged and have less suction power. Regularly check your dust compartment and empty or change it when it`s already 70-80% full.
The two main indicators to determine vacuum power performance are water lift and airflow. The water lift is measured in mmH2O, mbar or kPa. It represents the suction force and is the reference parameter for vacuuming liquids and heavy materials. The airflow is measured in m3/h or in l/s.
Push a broomstick through the hose to force any large clogs out. Take the end of the broomstick and feed it through the hose. Push the stick in slowly so you don`t accidentally break or puncture the hose. If there is a large clog in your hose, the broomstick will force it out from the other end.
Start the engine and spray

Scope out all the vacuum lines under the hood. Then start the engine and spray each connection with a light stream of water. If a connection sucks in the water, you`ve found your leak. A vacuum leak can cause a rough idle, high rpm, poor gas mileage and even trigger a check-engine light.

Suction hoses are also common in various industrial applications like woodworking. Because woodchips and dust can be hazardous in a work environment, these hoses are used to collect the materials to improve the quality of air in the room and prevent any dust from cluttering up the workspace.
North American Polyester Soft Suction Hose is used to transfer water from hydrant to pumper. MADE IN THE USA AND FULLY NFPA 1961 COMPLIANT. FEATURES OF NORTH AMERICAN POLYESTER SOFT SUCTION HOSE.
Generally, the vacuum hoses on your vehicle are made from rubber and are supposed to last for a lifetime. The rough conditions that exist under the hood of your vehicle usually lead to these rubber hoses becoming damaged over time.
All vacuum cleaners operate based on air flowing from the opening at the cleaning head or tool, through the vacuum cleaner and the bag and/or filter system and then out the exhaust port. This airflow is created by the vacuum motor, which also may be referred to as the suction motor.
Gravity and friction are the two main forces that make vacuum suction work. While gravity pulls molecules in the air toward the earth, creating an atmospheric pressure, the suction cup and vacuum pump cause a pressure difference, attaching both surfaces.
Troubleshooting your vacuum cleaner`s loss of suction

The filters can become clogged over weeks of use, reducing the vacuum cleaner`s suction. You should clean the filters periodically following the manufacturer`s instructions, but a significantly soiled filter should be replaced with a new one for optimal operation.

The average life expectancy of a mid-range vacuum cleaner is about six years. You can fix or replace things like blocked filters, jammed brush rolls, frayed hoses, worn-out stick vac batteries and broken accessories yourself.
Suction pressure is the negative difference in pressure between two places that drags liquid or gas from a higher pressure state to a lower pressure state. The suctional force in plants is caused by transpiration. This force aids the plant in obtaining essential minerals from the soil.
A suction pump works by atmospheric pressure; when the piston is raised, creating a partial vacuum, atmospheric pressure outside forces water into the cylinder, whence it is permitted to escape by an outlet valve.
Vacuum leak repair cost varies widely, depending on what is causing the leak. You could end up spending anywhere from $100 to $1,500. If it`s just a hose that`s leaking, and the leak is obvious, the mechanic just needs to install a replacement hose. Expect to spend $50-$100 on labor, plus the cost of the hose.
Fortunately, it is easy to repair a vacuum hose with this problem and the hose will only be a few centimeters shorter once repaired. In some cases, you wont need any new parts to complete the repair, but if you do they are readily available and much cheaper than a new hose.
Engine loses power or won`t start

If the pressure is too high, it can cause a head gasket to be pushed out, can cause cylinder head hardware to break or in some cases, will cause detonation inside the engine.

If there is a clog in the vacuum, you won`t have good suction and the vacuum won`t work. The clog can be in the vacuum head, the hose or where the hose meets the actual vacuum.
Signs of Vacuum Pump Leaks

Oil from the exhaust port running down the pump. Rumbling sounds coming from the pump. Repeated failure to reach maximum pressure for tasks. Mist or smoke coming from the exhaust section of the pump.

If the cleaner is still not picking up water, you may have to rinse out the various parts with water before continuing. Try to rinse out the water tank, including the foam filter, and also rinse out the nozzle as it may have clogs in it. Make sure the circular hose tool connection door on the nozzle is closed as well.
Suction Hose Pipes also known as `Hard Suction Hoses`, are a semi-rigid hose pipe made from flexible PVC that encloses a rigid PVC helix. They operate under negative pressure that means a suction hose pipes draws water from a static (unpressurised) water source. This is called a `Drafting Operation`.
A suction hose is where the water flows into the suction end of the trash pump. Likewise, the discharge hose connects to the discharge end of the pump. Together, they ensure a successful water movement from one place to another.
It is the same effect as a suction cup, just on a slightly less pronounced scale. The key is that, as you lift the cup, the water sticks to the glass, preventing new air from coming into the glass. Thus, as you lift, the pressure decreases inside the cup slightly, and you get the sticking effect you mention.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

No Suction I get great suction in the hose, but when I plug the hose back into the unit, there is no suction and the air flow indicator line goes completely red. I've changed the bag and filters. I took the small panel off the back and made sure there is no clog, and took the hose off to make sure there was no clog there. Still no suction. Please help.
ANSWER : I about to say that’s always a clog of some sort that causes that

No suction Hello – any help with this would be much appreciated!

I just changed the bag and filters. The machine runs, seems normal, but there is no suction. There is no blockage of the hose, as indicated by the fact that that little viewer window above where the hose connects to the unit is not showing the red portion that it shows when there is something blocking the hose (god, this is hard to describe!).

If I disconnect the hose and put my hand over the hole, I feel some suction. But

ANSWER : Well, it actually sounds like there is a blockage. Try removing your hose and dropping something through it, like a quqrter. If it comes through, no clog. If it is clogged, I believe that machine has a blower on the upper part of the cleaner (maybe in the bag compartment towards the top. You can take out the filter holder and plug the hose in there and run the unit . Does the blockage come out? If not, Try shaking the hose, or you can put a stiff wire in it to try to free it. Do not run water through it. If there is no blockage at all, then you will probably need to take it to a service center. But I am pretty confident that we are looking at a clog situation. Let me know if this fixesya! Thanks, Rene (vacuum Doctor)

Lost suction my DCO7 lost suction in the hose I started taking it apart and cleaning it and looking for clogs (probably more than I should have) and when I put it back together it has awesome suction in the hose but no suction in the base. It just pulls the pine needles up (christmas tree) but they never appear in the “bag” compartment and when I look they are just all gathered in a clump in the bottom by the brush.
ANSWER : Hi.
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.Remove the sole plate turn the 3 plastic screws to unlock & lift off.
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.Now remove the blockages that have accumilated from the oppening of short clear hose.
.Check you can turn brush roller & check belt.
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.Now reassemble switch on pull handle back & look under machine is brush spinning ?
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.If not check the knob on side of machine is in drive (D) position.
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.http://dysonmanuals.llc.nu
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.Chris..

My DC17 suction hose doesn’t have any suction occasionally.
ANSWER : Check the seal on the filter is not broken,And check for any blockage at the bottom of the pickup pipe.

Hose Problem The hose broke just above the cuff on the inlet end of the hose.  I found that the hose doesn’t thread into this cuff but appears to be heat bonded in some way. Can I get a replacement cuff or do I have to replace the hose?
ANSWER : Looks like you can just get the hose, part #38479-4, It should just screw into the adapter or it may be glued in.

No suction how goes it.. my hoover windtunner v2 has no suction through the hose.. it does however have suction from the body, but once i put the canister in, it has very little through the hose.. no blockage in any of the parts.. whats up
ANSWER : Check again for obstructions in the hose. Also underneath where the debri goes when it is being sucked up. Also make sure all your hoses are connected as this could effect the suction.

Poor Suction Heya! So I just picked up a used Dyson, but when I vacuum with it, the suction is pretty weak and it spits all kinds of stuff out the back and into my feet. When I pull the hose I have good suction, but in regular mode it hardly picks up anything. The brushes are spinning, and it eventually will clean an area if I go over it again and again. Maybe a clog somewhere? Please tell me that Dysons have better suction than my $50 Dirt Devil! Thanks!
ANSWER : I recently bought a second hand Dyson DC07. Its suction was poor. I removed all the un-clipable pipe bits and to remove any blockage but it all looked clear. The Final Sponge and hepper filter did have a lot of dust in it and the rotating brush was full of hair but nothing bad.
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.I eventual gave in to curiosity and removed the three screws in the top or the yellow removable dust collection tube and cyclone bit to see what was in there. The mechanism to release the flap at the bottom of the collection tube does not allow you to remove the lid completely but it does open far enough to get inside. I found the whole top section of the yellow plastic bit blocked by a big plug of compacted dust and a champagne cork. If you are willing to take the risk and have a torx 15 screwdriver handy it that part may be blocked. It did get a bit messy.
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.If I was going to attempt the same procedure I’d remove the dust collection unit from the vacuum cleaner as I did before, but leave the clear tube attached and the emptying flap firmly closed to reduce the mess from the dust falling out the bottom while cleaning the top part.

Suction hose I can’t get the suction hose to work…and I have cleaned it out to make sure it isn’t plugged. There is a small amount of suction just not enought to pick anything up…..the floor part works great…what could be the problem
ANSWER : I would first double check the hose, remove it and drop a marble through it to be sure. make sure the bag is new and also check the filter underneath the bag if it is clogged it could cut the suction.