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

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Hover mach 4 vaccum

Thermal overload switch went off how do i reset it

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  • ruben7566 Dec 27, 2007

    I have the same problem. I checked the ON/OFF switch and its fine.

    There is power going to the switch.

    The bag and filter are clean.

    The cleaner has not come on and its been three days.



    How do I check the motor, how do I get to it?



    Thanks



    Ruben

  • Anonymous Jul 31, 2008

    I have a Hoover and have the same problem. Takes a full evening to reset.



    Hoover vacuums are second rate at best. Best thing to do is buy a good is what I am doing, trash it and buy somthing that is worth the money.

  • Anonymous May 17, 2009

    my vacuum keeps cuting itself off. It seems like when I try it the next day it works for about 5 minutes then cuts back off. What's up with that? It was my mothers vac...and I have aquired it without a manual? It is a hoover windtunnel mach 6.1

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Usually caused from being plugged, so first find the plug and clear it. The motor has an automatic reset, should restart after about 30 minutes, if it continues to shut off, there is still a plug.

Posted on Dec 17, 2007

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I have checked everything and I do not see any plugs anywhere. I have cleaned the vacuum inside out.

Any other ideas?

Posted on Dec 28, 2007

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I have a Hoover Mach 2.7 Windtunnel that shut off during use and wouldn't turn back on. Was doing kitchen floor and running fine. Though a breaker tripped but didn't...what could it be?


Hello,

It sounds like your thermal reset switch inside of your Hoover may have gone bad. When a vacuum cleaner doesn't turn on it, it's either caused by one of four things.
  1. Electrical Short in your Cord.
  2. Plug has gone bad.
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Since this happened while you were vacuuming, I would guess that this is either your electrical plug that's shorted out, or that your thermal reset switch has shorted out. Your model Hoover was built with a protection system that is supposed to automatically shut down your machine if it senses any excessive heat. This mechanism is controlled by a Thermal reset switch which is located in motor compartment. This part is notoroious for failing, even when there's no overheating that's occured.

Before you disassemble the entire machine to check this part though, I would try testing the On / Off switch in your machine, as well as testing the electrical cord, which will also let you know if your plug has gone bad.

Here's a link to a solution I've done here on FixYa explaining how to check the On / Off switch;
http://www.fixya.com/support/r4530569-replace_off_switch_hoover_windtunnel

While you have this apart, you can use the same electrical tester to test your cord. Simply put one end of the test into the terminal from the switch, and the other end of the test on one of the metal prongs that plugs into the wall. See if you have continuity here, if not, switch to the other prong of the plug and see if this helps.

If not continuity, this means your plug, or your cord has failed. If you do have continuity, this means that it's either the On / off switch, or the Thermal Reset Switch that's gone bad.

Here's a link to the solution that I've done on here showing how to replace the Thermal Reset Switch on your vacuum cleaner:

http://www.fixya.com/support/r4999778-replace_thermal_overload_switch_hoover

If you'd like some more help diagnosing this vacuum, please feel free to just use the comment field on the bottom of this page. I'm always happy to help you do some more advanced diagnosing, or answer any questions you may have.

If you found this solution helpful, please be so kind and rate this repair helpful, or leave feedback for me. This is greatly appreciated by the FixYa community. Thanks so much,

Chris Jones
GoVacuum.com

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If you can't smell burning then it's probably a broken power switch or the vacuum got too hot and the thermal overload protection has tripped. Try leaving it off for 15-30 minutes and try it again. The thermal overload will reset itself during this time and it should work again.

In the meantime, make sure you have power to the vacuum, check for any blockages and check that the rollers in the cleaning head will turn by hand. Also, give your filters a clean. Any of these could cause the vacuum to overheat.

If you've already done this and/or power doesn't return after 15-30 minutes, I would start by checking the switch.

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http://www.fantom.com/fantom/manuals/Cyclone.pdf

At first I would think it was the thermal overload, which is covered in the manual. But I would guess that you have let it sit for 30 minutes to cool down and tried again and the vacuum still didn't work.
I would think you may have one of four problems.
1. Your thermal overload was tripped and is stuck and will need replaced.
2. You have a clog in your vacuum lines or the brush roller is froze, which keeps causing the thermal overload to trip.
3. Your power cord has a short, which would need replaced.
4. Your power switch is bad, which would need replaced.
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