Question about Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

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U5397-900 - wont clean carpet

My vacuum has good suction with the hose, the roller is working, however, it just hardly picks anything up anymore. Is it likely the aggitator brush is just worn down.

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Could be, but probably just needs a new belt - they stretch.

Posted on Dec 17, 2007

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Posted on Jan 02, 2017

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Very low suction when I use the hose, but the carpet brush roller attachment works fine. Any ideas?


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The hosing down below the attachment hose may still be blocked up and that will have to be cleared for it to suction again.

remove the attachment hose look down the hose at the back. you can also flip over the machine and look for the attachment hose to come to the brush roller. I assume it is blocked up there and not picking up properly.

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Lost suction. When up right there is suction but when I put it down to clean carpet no suction


Hello,

There are several things that this could be. Probably the most common problem that we see when customers come in with this problem is actually a fairly simple problem to fix. Here are just a few things that this could be.

The fist possible problem is a VERY common problem actually.

Possible Problem #1. The first problem is extremely common. In fact, we probably see between 2-3 of these problems every week. It mostly happens after people take the bottom plate off the vacuum in order to clean the roller brush. What happens is when they reinstall the bottom plate, they put it on on incorrectly. It's actually very easy to do. When the bottom plate (soleplate) is installed wrong, there will be a gap between the bottom plate, and the agitator housing, or the purple tray the roller brush sits in. This will cause the soleplate to be a few inches higher off the ground then it should be, preventing the brushes from even hitting the carpet. This makes it seem to the user that vacuum has lost suction power because without the brushes hitting the carpet, the machine will not pick up very well on floors, but when they use the attachment hose there's plenty of suction power.

Here's a picture of the WRONG way to install the bottom plate. Notice the gap in between the two housings:


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Here's another picture, that is the RIGHT way to install the soleplate:


8b953d0.jpg
I would say probably 6 times out of 10 this is the problem with the customers machine. If you checked the soleplate and it is installed correctly, move on to the second possible problem.

Possible Problem # 2. Turn the vacuum cleaner upside down so the brush roller is facing upwards. I found the easiest way to work on it is to put it on a counter top or work bench. On the left hand side behind the roller brush you should see a flexible transparent hose that goes from the motor to the agitator housing. This hose actually has a lot of strain on it when the vacuum cleaner is in the reclined position. When the first few series of Dyson DC07 models came out, they didn't make this hose long enough, so when the vacuum was in the reclined position, it would put too much stress on the hose, and cause the hose to actually crack, usually right where the end of the hose that goes into the agitator housing. Examine your hose and see if you have any visible cracks in this hose. If you need to you may just remove the entire hose assembly by pulling on it. It will easily come right out of the machine so you can inspect it better. Here's a picture of where the hose usually cracks:


54cb5e5.jpg
This would also explain why the vacuum works fine when using the attachments, but not on the floors. The attachment hose uses a different suction channel, and when the machine is in the upright position, no suction goes through this hose. If you do find a crack in this hose, the this hose needs to be replaced. Here's a direct link to that hose on our GoVacuum website.
Dyson DC-07 & DC-14 Upright Replacement Internal Hose Part # 904219

Possible Problem #3. I would suspect that this may not be the problem, but if neither of the solutions above worked, then try this one. Dyson's in general are prone to clogging. There are a few clog ports throughout the vacuum cleaner that were added there due to Dyson prototypes becoming clogged at these points. Here are pictures of how and where to check for these clogs. Simply remove the suction port covers at both of these locations:


8b33cd4.jpg

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If you are getting suction power from the hose, but the vacuum still doesn't pick up on the floors, I think that these solutions should fix your problem. If you just replaced the clutch mechanism, the roller brush should be fine, but turn the vacuum over on it's side and make sure that the roller brush is actually spinning while it's on carpet mode. If none of these problems fixed your Dyson, please use the Clarification Request, or leave another comment here on the Fixya repair page, and I'll be happy to further diagnosis the vacuum cleaner with you.

I hope this was helpful to you. If so, please be sure to rate the repair as helpful by clicking the thumbs up icons in the top of the repair page. This is what keeps Fixya repair professionals like myself continue posting these detailed repair solutions for free, rather then just the premium ones that users pay to have answered. We really do appreciate when someone recognizes the work you've done. Thank you very much,

Chris J.
GoVacuum.com

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