Vacuums

How to Identify and Fix Common Vacuum Problems ?

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

Loose connections will cause your vacuum cleaner to lose suction. Make sure that the dust container, the hose, the tube and the brush are all attached properly. If the problem continues, your vacuum cleaner might have a technical problem. If you suspect this to be the case, contact an authorised service agent.
Check the hose for any clogs

If your Shark vac has a hose, feel along the length for any lumps. That indicates a clog that`s causing your suction issues. See if you can break the clog by applying gentle pressure with your hands, or gently move it to the end of the hose to remove it.

The main measurements used in suction power are airflow (CFM), air watts (AW), water lift (inches of H20), amps, and horsepower. It`s the most crucial part of a vacuum cleaner. The power of your vacuum`s suction is determined by the suction motor which converts electrical power into the power of suction.
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.
Even in a vacuum there remains some pressure… it is simply a pressure at a magnitude below the surrounding atmospheric pressure. Vacuum does not necessarily mean the absence of all pressure; vacuum can be any pressure between 0 PSIA and 14.7 PSIA.
One bizarre consequence of this uncertainty is that a vacuum is never completely empty, but instead buzzes with so-called “virtual particles” that constantly wink into and out of existence. These virtual particles often appear in pairs that near-instantaneously cancel themselves out.
If all you hear from the vacuum unit is a click at the when you try to start the vacuum motor from inside the house, then the motor in the unit is dead and has to be replaced. A strong odor from the shellac, which coats the copper coil windings, is an indicator that the motor is about to or has burnt out.
Suction is the measure of pressure created by a vacuum motor measured in inches of water lift. Air flow is the measure of air volume flowing through a system measured in CFM or cubic feet per minute.
Suction pressure should be kept at less than 200 mmHg in adults. It should be set at 80 mmHg to 120 mmHg in neonates.
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.

Clog located in the vacuum hose

Turn the unit on and feel the suction at the end of the hose handle. If there is no or low suction, then the clog is in the hose. You can remove the clog by running a long, stiff object through the hose, such as a butter knife, starting at the wall end.

The air that fills the box is being pushed by air pressure into the empty space. Vacuums never “suck” air. What they do is present an empty space and then air pressure forces the air into the vacuum.
Any negative pressure significantly below standard atmospheric pressure (760 Torr/mmHg, 29.9 inHg or 14.7 PSI) is considered a vacuum.
Sound cannot travel through a vacuum as there are no particles present for vibrations to take place.
Fine particles. Fine particles are no match for even the strongest vacuums. Construction dust, makeup, used coffee grounds, fireplace ash, and other fine particles can burn out the motor and be released back into the air. It`s best to sweep these items up to keep your vacuum – and yourself – safe.
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.
Suction too high

If the vacuum is hard to push, the suction could be too high. Make sure the power button is on the right setting for the respective surfaces. Position I is for bare floors and position II for carpets and rugs.

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.
Regardless of what type of vacuum cleaner is being used, all of these products have a motor to create the negative pressure, or suction, necessary to draw in the dust and debris.
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.

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

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No suction there are no clogs in the hose or underneath it blows air out but the hose does not have any suction
ANSWER : Check your belt it may need to be replaced.

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Suction stopped. Roller and belt working-in fine order. Checked hoses have not found any blockage. Blowing out air or sucking so little can’t feel it with hand on hose end. Help!
ANSWER : Either a blockage or the main air filter is blocked , some it can be washed and others it must be replaced

I would check the owner manual and look at the filter, foam ones can and usually have instructions where they install to wash them.

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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..

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I have a new bag in, checked the hoses for clogs have the motor cover off showing motor runs. Problem is vacuum has no suction in hose area, cover off where bag is and the air blows out of filter. hoses are clean no blockage.
ANSWER : Have you checked the filter? Many vacuums have a filter under or behind the bag to keep dust and dirt out of the motor. If this gets clogged the motor can’t get any suction. Also look for holes in the hose or in the small segment between hose and bag.

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Clogged hose… I have a clog in my hose, probably a sock, I have pushed it through to the hard plastic handle end of the hose, help! can the plastic handle wand be disconnected from the hose to remove the clog??? Thank you
ANSWER : Hi!
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.Low suction, poor pickup, or no suction may be due to a clog in the vacuum cleaner. If you notice a change in the sound of the motor or a reduction in the spinning action in the Dirt Container, check for clogs. Unplug cleaner from electrical outlet. Empty Dirt Container. Check Upper Tank and Louvers for build up or clogs. Check to make sure Louvers are installed correctly. To unlock the Louvers, grasp the rim and turn toward the left. Pull straight down to remove. If the Louvers are missing or not locked into place, check and clear the tube in the center of the Dirt Container. Remove the Twist ‘n Snap Hose from the vacuum by turning to the left. Check the Suction Inlet, Hose and Hose Wand for clogs. Remove any clogs from the hose using a long, narrow object. Check the Foot Hose for clogs. If needed, remove the screw attaching the Hose Wand Base to the vacuum. Straighten the Foot Hose and unclog with a long, narrow object. If the clog persists, then check the Rotating Floor Brush the Air Passageway for obstructions.
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.Please do rate this solution as FixYa and revert for further assistance.
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.Thanks
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.Rylee

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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)

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No suction I have the central vac type. It has no suction at the can. I pulled the hose going to the walls and tested there…and nothing. I removed the dirt can and checked the motor …it is spinning but does not feel like any suction. I checked the exhaust and it is pushing strong air out. I also cleaned the filter and still nothing. Is there a relay or something that would cause only exhaust air. I emptied the can of dirt and put it back together and have absolutely no air…..hear the motor
ANSWER : On some units there is a screen that protects the impeller of the motor. If this gets sealed off with debris then it is like putting a potato in the tail pipe of a car. Taking the top off the unit reveals the motor. DO UN-PLUG the unit first from the electrical outlet. Take off the exhaust piping if any to allow the motor to be lifted out of the canister. There is typically enough wire to allow this without taking any wires off. Look at the bottom of the motor to make sure the nut has not spun off the impeller and it is still attached to make suction. The look at the hole (aprox. 2″ round) to make sure it is clear of any debris. If it is not clean it and re-install everything. If the impeller is off the motor it is new motor time.
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.Hope this helps!!
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.VR

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