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My Hoover Windtunnel has a red light when area is dirty and changes to green when clean. Now both lights stay on all the time. Why

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6ya6ya
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Posted on Jan 02, 2017

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ahamed100
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If it is blowing air, then it is still clogged up somewhere, you didn't give your model number, but some of these have removable covers on each side and on the back. Also make sure that all covers are back on securely.

Posted on Feb 25, 2008

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SOURCE: red light stays on

It sounds like the plates inside the vacuum that detect the dirt have become dirty. I don't remember where they are, but I think they're accessible if you remove a certain hose. Again, I don't know which hose it is.

Posted on Jan 17, 2009

  • 1 Answer

SOURCE: hoover windtunnel dirt finder light stays red

I'm not sure about a 3 month old vac, I'd probably go the warranty route. However, for the older vacs thy start getting false positives. The sensor is simply a microphone hooked to a computer chip detecting sounds of dirt entering the bag.
To rig it to start working, you'll need to remove the tool accessory tray and elbow that enters the back of the vac, and attached to the bag. This will reveal the microphone at the elbow, and wire that runs into the bottom area of the vac. When on, a large amount of air comes from the bottom screw and area where the wires enter. My fix was to clean up the microphone contact points a little bit with a screwdriver, and then leave the vac running while putting in dampering in the hole at the bottom, and around the back of the elbow. Cotton balls and electrical tape at the bottom hole, and napkins around the outside of the elbow (wedged between the back of the vac assembly and elbow did the trick). The schematic for the vac is here: http<colon>//www<dot>vacsrus<dot>com/CartGenie/pg_U6485900<dot>asp
Look for micrphone.

Posted on Jun 27, 2010

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I have a hoover bagless windtunnel tseries paws. I recently cleaned all the filters & put back together & when I did I thought the red would turn to green like it was reset so wouldnt be showing...


The dirty finder light is a microphone, located in the elbow (where hose secures to machine). The problem is either the contacts on the microphone need to be cleaned (use wire brush) or the switch is full of dust (remove small circuit board from the front (where the light is), with a razor blade carefully pop the cover off the switch box and remove the dust.

Sep 01, 2011 | Hoover U6630-900 WindTunnel Bagless...

2 Answers

Hoover windtunnel dirt finder light stays red. We've cleaned the elbow the roller the hose and have a clean bag. The vacuum is new only had it for 3 months.


I'm not sure about a 3 month old vac, I'd probably go the warranty route. However, for the older vacs thy start getting false positives. The sensor is simply a microphone hooked to a computer chip detecting sounds of dirt entering the bag.
To rig it to start working, you'll need to remove the tool accessory tray and elbow that enters the back of the vac, and attached to the bag. This will reveal the microphone at the elbow, and wire that runs into the bottom area of the vac. When on, a large amount of air comes from the bottom screw and area where the wires enter. My fix was to clean up the microphone contact points a little bit with a screwdriver, and then leave the vac running while putting in dampering in the hole at the bottom, and around the back of the elbow. Cotton balls and electrical tape at the bottom hole, and napkins around the outside of the elbow (wedged between the back of the vac assembly and elbow did the trick). The schematic for the vac is here: http<colon>//www<dot>vacsrus<dot>com/CartGenie/pg_U6485900<dot>asp
Look for micrphone.

May 12, 2010 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

My Hoover Dirt Finder red light stays on. All


Inspection of the circuit board found that the 470uF capacitor looked damaged. I replaced it and I now have the Green and Red lights are working correctly.

Jan 19, 2010 | Hoover U6476-910 WindTunnel Upright Vacuum...

2 Answers

Red light stays on


It sounds like the plates inside the vacuum that detect the dirt have become dirty. I don't remember where they are, but I think they're accessible if you remove a certain hose. Again, I don't know which hose it is.

Jan 17, 2009 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

RED LIGHT INDICATOR


You either have a problem with the sensor or the circuit board. Most times it is with the sensor. Take the hose off, look inside of the part that the hose hooks to, you will see a disc, it may be clogged with dirt, try cleaning it, if that doesn't work, then the sensor may be bad.

Dec 14, 2008 | Hoover U6437-900 / U6439-900 Windtunnel...

4 Answers

Dirt finder sensor stopped working


I had the same problem with a hoover windtunnel 6200 - u5477-900. I removed the flexible hose from top of the plastic tube running vertically along the right side of the back of the vacuum. When I used a flashlight to look into the plastic tube, I could see a clog at the bottom, where the flexible hose curved frontwards towards the brushes. I then removed the 2 screws holding the vertical plastic tube to the vacuum. When I disconnected the plastic tube from the flexible hose at the bottom, I found a clog of dirt and dog hair. After removing the clog and reassembling, the clean / dirty light now moves back and forth from red to green.

Jan 29, 2008 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

Embedded dirt finder light stuck


Try cleaning out all the pathways you can get to. Trapped particles can mess up this indicator. Particularly check the extra mesh filter that is under the bag (there's a plastic grid that snaps over it to hold it into place). Clean that out and make sure the bag is securely in place.

Dec 04, 2007 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

Dirt finder


The sensor may be bad, or it may be coated over with dirt. Re,ove the hose at the back of the vacuum, the head of the sensor is down inside that opening, reach in there and clean it off and see it that corrects the problem, if not replace the sensor.

Oct 16, 2007 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

Embeded Dirt Finder


check out the switch that activates it. go to thehooverstore for a complete listing of hoover machines. I'm sure you'll find your machine listed along with an exploded diagram of the machine

Sep 19, 2007 | Hoover U6437-900 / U6439-900 Windtunnel...

1 Answer

Embedded Dirt Finder green light won't come back on - stays red


The dirt sensor is a motion detector. After it gets dirty it will either stay red or stay green. You can have the vacuum serviced at your local vac shop and possibly get this fixed. Sometimes they are as good as new and sometimes they are not repairable. It will not effect anything else though.

Jun 09, 2017 | Hoover U6634-900 WindTunnel Bagless...

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