20 Most Recent Hoover Ultra U6430-900 WindTunnel Bagged Upright Vacuum Questions & Answers

It doesn't matter which way it goes but I recommend replacing it rather than cleaning it.

Hoover Ultra... | Answered on Sep 08, 2017

By your description I believe you have a Hoover Windtunnel self propelled upright vacuum. The belt tensioner will tighten up the belt and make the brushroll spin when you recline the handle into the vacuuming position if the hard/carpet lever is in the proper position.

Hoover Ultra... | Answered on Mar 04, 2017

Yikes, that is definitely a rare problem! Unfortunately those power drive assemblies are not made to be repaired, just replaced.

Hoover Ultra... | Answered on Mar 22, 2016


How To Replace The Thermal Overload Switch on Hoover Windtunnel Uprights

All Hoover Windtunnels have a safety feature that will shut down the motor if it starts getting to hot, which prevents the motor from burning out. Usually after this switch trips itself you just need to let the machine cool down for 30-45 minutes and it should come back on. Sometimes even after clearing a clog, or replacing the filters and bags, the vacuum will continue to cut off. If you're absolutely sure that there's no obstructions, or other things that are causing the motor to overheat, then the thermal reset switch itself may have gone bad. Usually you can tell when the switch is bad by feeling the motor cover immediately after the machine shuts off. If it's warm or hot to the touch, this indicates there is something still stuck in the machine. If it's not hot, this means usually the thermal switch itself has gone bad.

Here's how you can replace this switch. Again, it's very important to check all other possible fixes before attempting this repair.

What you'll need to do this repair:
  1. Phillips Head Screwdriver
  2. T20 Torx Bit Screwdriver
  3. Hoover Windtunnel Thermal Reset Switch (this varies from model to model, please contact us to find out which exact one your model uses)

Use a countertop or work bench, and turn the vacuum cleaner upside down so that the handle is resting on the floor, and the brushes are facing upwards. Unscrew the four screws on the corner of the bottom plate that covers the brush roller:

Remove the bottom plate, then pull the roller brush and belts out of your machine. There are 3 screws that hold the top brush cover in place that need to be removed. On the right side the screw is down below the transmission to the right. There's also a screw in the agitator tray, in the middle that needs to be removed. NOTE: This small screw in the agitator tray is only present on some models, may or may not have this little screw, but all models will have all other screws circled. I have circled both screws that need to be removed:
The screws on the left side that need to be removed are also circled. One screw holds the upper brush cover on, and the other two screws secure the hose in place. Remove all three screws as well as the transparent hose cover:

After all of these screws have been removed, there are two clips that are the last things holding the top brush cover onto the vacuum. Use a flat head screwdriver to push these clips off on both the left and right sides. The right side clip is near the pulley that the flat belt rides on, and the left side clip is next to the internal hose.

After popping these two clips out, put the machine on top of the table or work bench, and remove the top agitator housing. You'll see on both sides of the vacuum, two metal brackets that have two black screws. These brackets actually secure the agitator housing to the upright part. All four screws need to be removed from the machine.

After removing the 2 brackets from the machine, you'll now to need to release the self-propelled cable from the agitator housing. Unscrew the 2 screws that are circled (in red), then use your Torx T20 Screwdriver and remove the washer and screw from the actuator arm on the transmission (circled in green)

You will now be able to completely remove the agitator housing (the plastic housing that roller brush fits into) from the rest of the vacuum cleaner. It's best at this time to remove the door that covers the vacuum cleaner, as well as removing the bag itself. Next, remove the two silver screws that hold the headlight lens in place, and remove the lens:

After the headlight cover has been removed, you'll now have access to the light bulb. Unscrew the black screw that secures the headlight. Now you'll need to remove the motor cover to get inside the motor compartment. There are 5 long screws that hold this cover down, two of these are underneath of the plastic piece directly above the headlight (on some models, the dirt finder controls that turn red and green when the floor is clean):

If your model has an "Embedded Dirt Finder" control, carefully turn the plastic housing over so that the circuit board inside is facing you. You can see at the top of the circuit board housing two plastic clips. Simply pull these two clips back with your hands, and release the circuit board from the plastic housing.
There are two wire harnesses that connect onto
this circuit board that need to be removed also. The larger terminal that has the black and white wires has a simply clip that you press, and pull out, the smaller blue and white wire terminal just simply pulls off without having to press a clip.

After removing the circuit board, you'll see a foam part where the headlight, and the two wire harness from the circuit board go into the motor housing. Simply use a pair of needle nose plyers and pull upwards on this foam part to remove it:

Now you can remove the motor cover, and get direct access to your motor. The thermal reset switch is located on the orange wire, right before it connects into the motor terminal. I have highlighted the actual thermal switch in the picture below.

I found that it's much easier to splice the new orange wire to the old wire as opposed to opening up the entire rear of the vacuum to get access to the other end of the orange wire. Cut the existing wire where I have marked it with an X in the picture of above, and use a simple Wire Nut to attach the new orange wire to the old one.

After splicing the two orange wires together, simply re-install the motor cover over top of the motor. Now plug the machine in and let it run for 15-20 minutes while the machine is still apart, just to ensure that the new thermal switch corrected your problem. If the machine did not cut off while testing it, great! Simply put the machine back together and you'll be back to vacuuming.

I really hope that this repair tip was helpful. Due to the complexity of this repair, and the length of time it takes, most vacuum repair shops will charge a lot of money to do this. Hopefully with this guide, you'll be able to complete this repair on your own.

If there's a step that you don't fully understand, or if you have any follow up questions, please don't hesitate to use the comment field, or the clarification request, and I'll be happy to answer any questions for you.

If you need to obtain any of these parts for your vacuum cleaner, please visit our website. Here's a link to most of the Hoover Windtunnel parts that we sell online. If you need something that's not listed, feel free to give us a call or use our online live help chat.
Hoover Windtunnel Parts & Accessories

If you found this repair tip helpful, please be so kind and rate my repair helpful, or leave me some feedback.

Thank you,

Chris Jones

on Dec 18, 2015 | Hoover Ultra U6430-900 WindTunnel...

No the pulley should be tight and not slide back and forth

Hoover Ultra... | Answered on Nov 23, 2014

Hi there! There is no reset button on the cleaner. The vacuum has a thermal protector sensor that will shut the vacuum off when the motor reaches a certain temperature. This is usually caused by a clog or filter that needs to be cleaned or replaced. Be sure to check the hoses for clogs and clean and replace any filters if needed. The vacuum will turn back on when it cools off, this can take up to an hour. Good luck!

Hoover Ultra... | Answered on Nov 11, 2014

Hi there! The drive pulley is not a sellable part. We do not recommend repairing this part on your own. Follow the link below to locate the nearest authorized service center to take your vacuum for repair. Thanks!

Service Center Locator

Hoover Ultra... | Answered on Oct 29, 2014

Hi there! The drive pulley part 38537013 is not a sellable part. We do not recommend repairing this part on your own. Follow the link below to locate the nearest authorized service center to take your vacuum for repair. Thanks!

Service Center Locator

Hoover Ultra... | Answered on Oct 29, 2014

The drive pulley can be replaced, however I would only recommend being service by a vac shop professional who has experience with the Hoover Self Propelled models.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

Hoover Ultra... | Answered on Oct 22, 2014

MOre than likely you have a clog of some sort between the two points. Unplug the machine and try using an unfolded coat hanger to fish out whatever it might be.

It is also possible, however that there is NOT suction at the lower have and the beater bar is just making you think there is.

Replace the bag (and while it's apart , why not replace the belt as well) and you should be good to go!

Hoover Ultra... | Answered on May 26, 2014

download one from the hoover sight it is free

Hoover Ultra... | Answered on Mar 21, 2014

Hey. I believe you will need to replace the main PCB board too. My new handle was sent with a new PCB board. However, I tried just replacing the handle first and it acted the same way you describe. Once I changed the PCB board it worked fine. Hope this helps.

Hoover Ultra... | Answered on Jul 17, 2013

It sounds like the handle release lever is bad if the unit will not stand up. It's common when those units get a little older. It is unlikely you'll need the rear handle assembly (the part with the filter housing) but it does happen. Inspect the latch on the handle assembly to make sure it's not too worn to know for sure. Chances are, the handle release lever is just spent.
Here's the part you're looking for:


As long as you're into it the belts and roller are always a great investment. Replacing them will make it clean like new again. I'll include the links for those parts as well.

Flat Belt:



Happy Vacuuming!
The Vac Dr.

Hoover Ultra... | Answered on Jan 15, 2013

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