I have narrowed it down to the small circle behind the hose just below where it attaches to the body of the unit, but have no idea what causes the noise. I assume it's due to a seal loss or a clog, but I cannot find it. Sound goes away when hose is removed to use attachments - returns when replaced.
After reading some other entries about similar problems, I turned to the bottom of the vacuum and where the hose starts, just behind the roller. What I found was a large Lego wedged in the opening. Removed it and we're as good as new. I actually wonder how it got in there because it was a B***H to get out. I thought I was going to break the plastic molding around the rollers, but I finally got it loose after about 20 minutes of fiddling with it. Kids!!
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Heather,Does the vacuum have a switch or a lever somewhere that makes it change from floor to hose? If so, it sounds like you've been using it on the hose selection but not actually sweeping using the hose. In other words, on an upright vacuum when sweeping just with the vacuum normally have the lever on floor setting and if you use the hose/attachments you have to have the lever on hose setting for things to work correctly. Hope this helps! Deanna
you may have a blockage in either the hose, the telescopic wand or the power nozzle/floor attachment. The easiest way to tell, as you have a new bag in there is to disconnect the hose and start the machine. If the suction is good there, start to narrow it down. Take apart the hose from the telescopic wand, take the attachment off and look through the wand. Look in the connection on the attachment as well. If not there, look inside both ends of the hose, you may need a flashlight for this, and see if there is anything blocking there.
If the hose is blocked, you can try to unblock it by turning the machine on and inserting the handle into the machine where the hose would attach to the unit. Sometimes this reverse of suction is enough to dislodge whatever is in the hose.
Unplug the machine..now if you remove the attachment hose at the body of
the vac and feel inside (to the right about an inch) their is a
"suction cover" that rotates when the wand is removed (aka using
atachments). The cover in your machine is NOT rotating correctly, so it
does not get full suction. If you do get some suction from the hose then
their is at least a 'small opening' because it has partially rotated. I
was able to fix this problem by taking a large screwdriver (1.5 feet
long, thick as a pen), inserting it into the small opening (on the
suction cover, inside to the right at the top) and forcing the cover
down all the way by lifting the screw driver up against the top of the
body opening. Seems to have corrected the problem, but may reoccur. If
you have NO suction at all then it has failed to rotate whatsoever, and
Im not sure how to correct it.
This is a telltale sign that your vacuum cleaner is clogged. When the motor makes the higher pitched louder noise, your motor is not able to pull air through it, and has to strain harder because it's not able to breath.
Because you have already narrowed it down, that the noise only happens when you put the wand back into the vacuum, this means that you clog is definitely in the bottom section of the vacuum cleaner. Most clogs on upright vacuum cleaner occur right at the suction port behind the roller brushes on the bottom of the machine. Turn the vacuum upside down so that the brushes are facing upwards. Unscrew the bottom plate of the machine so that you may access the roller brush and belt. Look behind the brush roller for the opening of the vacuum where the suction port it. Look inside here and see if you can visibly see anything lodged inside. Sometimes just pushing a long screw driver into this hole can dislodge the obstruction.
If you aren't able to see anything in this port, and the screw driver doesn't dislodge it, look inside the small section of how that the wand connects into, and try pushing your screw driver down this hose to see if you can dislodge it from this part.
Sometimes a metal hanger can also effectively unclog hoses on vacuum cleaners, but just be careful that the hanger doesn't tear the lower hose section while you're pushing it through.
Also if you have another vacuum in the home, using the hose from the other vacuum and putting it inside the lower hose, or the suction port behind the brushes while you're pushing with the screw driver will also many times dislodge the obstruction easier.
Please let me know if this was able to unclog the vacuum cleaner, and I'd be more then happy to try and do some more advanced diagnosing with you for your vacuum cleaner.
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Here is a possible solution. If the vacuum sounds normal when the green light comes on, then the issue is a suction bypass. Kenmore built a suction bypass in to help cool down and protect the motor should someone either never clean the filter, empty the canister or somehow manage to clog the hose. There is a spring holding the bypass closed and is overridden by vacuum suction. I guess the spring becomes weak, allowing high suction to pull it open which in turn reduces suction so it closes again. It can do this several times per second making a loud racket and slightly affecting performance until the sensor goes green, then the vacuum suction is too low to overcome the spring tension thus why it sounds fine then. The trick? The very hard way (what I did) was to open the vacuum, open the casing where the spring is and pull it apart slightly to increase the spring tension. The easy way is to put tape over the hole where the bypass is. The inlet is under the hose track on the back on the right side as you're looking at it. The hole is about the size of a quarter and you'll see fins across the hole. The tape would keep the suction. The motor would still pull back the bypass but since tape is applied, there would be nothing to reduce the suction thus keeping performance and reducing the noise. However, this circumvents the intended design so you do so only at your own risk.
Check the electrical connections between the hose and the body of the machine, and also the wand connections all the way to the power head. Sometimes a faulty connection can send a false "off" signal back to the main body of the machine, and turn it off; but usually it will restart if that's the case. It sounds like you have a clog somewhere which is tripping your motor's thermal cutout, but you did say there are no clogs... so if you have full suction all the way down to the powerhead that's not the issue. You could have a faulty thermal switch, but I think the likely cause is, as usual; the sumo board.
Good luck. Sorry I didn't have a more concise answer for you.
can any one help, Our Dyson Animal vacuum has plenty of suction when it is upright and
the attachments are being used off the hose, but when the handle is
tipped back to begin cleaning carpets the beater head is getting no
suction. As the handle is being tipped back you can hear what sounds
like a flapper valve in the body of the vacuum opening and then all the
suction just goes away.
Had the same problem tonight. Took the entire thing apart only to find there was a much simpler solution. Check the small hose that runs from the brush rollers where the longer hose (on the back) attaches to the side of the vacuum. Easiest way to do this is to lay the handle down and stick something (coat hanger worked good) through it until it comes out of the head. I found a pretty good sized fuzz plug in mine. As soon as I removed it, everything worked great again - and no noise!