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Hoover - Red Light Dirt Sensor

Dirt Sensor Light stays red continuously on my Hoover U6433-900 Wind-Tunnel Upright Vac. I checked for a sensor light/beam in vacuumed air path that might have gotten covered over with dirt particles - but could not find one. Not sure what other kind of sensor technology they may be using or where else to look for a sensor.

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  • Anonymous Mar 17, 2014

    wind tunnel red light shuts of vac

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Check to make sure the settings didn't get inadvertently switched to the hi position, move the switch back and forth from high to reg a few times, then leave it on reg.

remove and hand wash the primary filter and secondary filter, dry throughly and replace them in the vacuum.

if none of this works, you will need to have the vacuum serviced, or if it is still working, just don't pay attention to the dirt-finder. the dirt sensor on your vacuum is located in the suction tube and is generally not accessible enough to clean without taking the vacuum apart.

hope this helps,
trin

Posted on Nov 20, 2007

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Try cleaning the dirt sensor and clean the inside of the tube that goes into the bag with a damp cloth.It wont hurt anything it will continue to work

Posted on Nov 20, 2007

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1 Answer

The dirt sensor light stays green. It won't turn red, even when I know I'm picking up a lot of dirt.


The Board(46851083) is No Longer Available
The EDF Duct (47823004) EDF= Electric Dirt Finder is $20.40 from
http www searspartsdirect com model part u6485900 0517 0645000 50039309...
You can test the board by crossing the 2 connectors to "close" the circuit for the mic (small black and blue wire) while vac is running and light should go to red every time you complete the circuit. WARNING: There will be exposed electrical points on board that could cause an electrical shock!!! or damage to board if not just crossing mic connections.

Jan 22, 2016 | Hoover U6485900 Bagged Upright Vacuum

1 Answer

Hoover wind tunnel the red light dirt finder stays on


There's a microphone inside the tube the dirt runs up. It listens for dirt coming up the tube. They just go bad and there's no making it better. You can either replace that entire assembly or ignore it. Fairly easy to replace. I'll include the part so you know what you're looking at.
Good luck! The Vac Dr.

http://vacuummedic.com/product.php?id=481

Jan 13, 2013 | Hoover Company Wind Tunnel U53019 Upright...

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

Filter in Hoover Wind Tunnel Vacuum


Definitely not. Do not use water or any liquids to clean it. Te normal use life is 2-3 years keeping it maintained. You can clean it dry with the dust brush from your vac attachments. place in a plastic bag and tap it some folks even us an air compressor to blow out the impacted dirt. you will only want to use the Hoover brand, other generic brands dont fit as well.

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

Jan 17, 2009 | Hoover U6630-900 WindTunnel Bagless...

1 Answer

Hoover Dirt Finder (light) not working


Good be a bad sensor, but if less then a year old, it is under warranty. I would take it in to a warranty repair shop and have them fix it.

May 10, 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

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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