Question about Hoover U5450-900 Windtunnel Supreme Bagged Upright Vacuum

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Hoover U5450900 The Dirt Finder light on my Hoover is continuosly lite. Is there a sensor that needs to be cleaned? and How can I clean it if there is one? Thanks, any help would be appreciated.

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  • mizfixit Nov 15, 2007

    The red light stays on constantly. I took the light cover off and found the red and green lights. The red one was lit but not the green. It looked ok, with nothing broken or loose. The "bag full" light also doesn't work anymore. I really liked this feature when it worked. Thanks

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On the back, take the hose off, inside the duct you can see a disc,(it is on the bottom of the duct) it may be filmed over with dirt, that is the sensor, clean it off then try again. If it still comes on, then it may be bad or you have a clog in the hose or the dirt inlet by the brush roll.

Posted on Feb 28, 2008

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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.

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Hoover - Red Light Dirt Sensor


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

Nov 20, 2007 | Vacuums

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.

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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.

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4 Answers

Embedded dirt finder light stuck


The Hoover uses a small microphone that is positioned in the plastic housing that the end of the hose fits into, just behind the bag compartment. What happens is that when dirt comes up the hose and hits the 90 degree corner, just before it enters the bag, the microphone picks up the sound and transmits that info to the electonics that controls the lights. Sometimes the microphone will stick and the red light will stay lit. If you take a screwdriver and give the microphone area a sharp tap with the handle of the screwdriver, this will often jar the microphone and it will begin working again. If not, it may need to be replaced. NOTE: this function does not affect the cleaning efficiency of the vacuum. Your vacuum will still work normally whether the dirt sensor is working or not. It is a totally unrelated function to the vacuum itself.

Dec 31, 2007 | Vacuums

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

Hoover Savvy


Does this happen at both Dirt Finder Sensitivity settings?

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