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Okay. I read these posts and decided to take the advice of checking the hose. I had cleaned all filters, checked all hose (as-is) and did belt checks, etc. The indicator was always showing red and it would shut down after about 5 minutes. It ended up being a clog that I discovered after taking the hose completely off and seeing a clump right where the hose detaches. I began swinging the hose round and round and sure enough, more cat hair clumpls shot out. Big clumps. So, you literally need to check every inch of hose to find the culprit. After that, my indicator stayed green and it works like a charm. Best wishes, Mike D
Check the nozzle . Turn it over on it's belly and remove the 4 screws that hold the base plate on. Take off the plate and remove the brushroll. I bet you will see a clog in the intake. If not take it to your local vac shop and let them fix it.
Check the hose for a blockage. If you remove the hose, if there is suction at the point where the hose hooks to the back of the vac, then the hose is clogged. If no suction there, check filters, make sure they are clean.
http://www.geeksquad.fixya.com/ThreadView.aspx?prdid=40600&thid=562967 Hoover Wind tunnel supreme, loss of suction posted by bazballfan on May 01, 2008 Hello, I purchased two of these models in late 2007 and after changing the bags on each of them I have little to no suction with the vacuum. The hose is fine and I have taken them apart and there is no obstruction in the hose or in the base. These worked so well and now they don't do anything. The bag isn't filling much and the simplest things can’t be vacuumed up Please help me to fix this Hello, I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. Hoover U5450-900 Windtunnel Supreme Vacuum Sorry you are having a problem, it sounds lie you have done almost everything, but just in review it could be some of these problems: Belt change – every 4 to 6 months Are the brushes in good shape Where does your suction drop off Is the bottom plate securely on the bottom Are there any gaskets that are broken or leaking Is the bag installed securely Did you check for any clogs or obstructions Is the filter clean Feel free to contact your local vac dealer in your area. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions. http://www.hoover.comTelephone Contact our Customer Service Department at 1.330.499.9499 Monday through Friday 8 a.m. - 7 p.m. EST Thanks,Don – The Vac Man Go Ahead.Use Us.
http://www.geeksquad.fixya.com/ThreadView.aspx?prdid=40485&thid=557365 Hoover Windtunnel self propelled U6617-960 Posted by srkelly on Apr 29, 2008 The vacuum has no suction at the floor. I have checked the hose, and no blockage. When I try to use the attachments, still no suction. What could be the problem. Hello, I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. Hoover U6437-900 / U6439-900 Windtunnel upright Vacuum You definitely have a clod between the tube by the brushroll area and the attachment hose and the best way is to take a wire hanger and make a little hook on the end to see if there is a clog, the clog is closer to the fan area and anything big would clog up the area sideways and -- you may have to remove the top cover to see if there is a clog and to better get @ it from the top. Another suggestion is to do a belt change whether you have one or 2 belts on the vacuum and to change the belts @ the same time every 4 to 6 months. Also, check you owner’s manual under trouble shooting to see if there is something else, other wise that is what I think is the problem. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions. http://www.hoover.comTelephone Contact our Customer Service Department at 1.330.499.9499 Monday through Friday 8 a.m. - 7 p.m. EST Don – The Vac Man Go Ahead.Use Us.
Do you have suction at the hose end, if you do then it may be clogged at the inlet by the brush roll. Is the filter cartridge clean? If it is clogged and air can't pass thru it, then you will have no or low suction. Might also check the belt to make sure it is turning.
Take out the duct in front of the tank (#3), the hose end will have a duct on it that you insert in its place. This provides the suction for the hose. Don't forget to put that duct you took out back in place, or you won't have suction when you use the steam cleaner.