Red light stays on

Dirt Sensors are sensitive. It doesn't take much to set them off. Try pulling back on the handle to raise the brushroll a few inches off the floor so you know it's not detecting particles of soil. If the light doesn't turn green it may have dirt on the sensors and need to be cleaned.

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.

That can mean the bag is full.

Black to Black - White to White, Green to Green (copper). Put a wire nut on the red wire.

The Black is suppose to run the light (or the fan) while the Red is suppse to run the fan (or light). The White is common and the ground is ... well the ground.

If you have a light kit on the fan, you can control the light and the fan separately ... or you can run them together.

Let me know how this comes out ...

Thanks for your question @ FixYa.com

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.

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.

http://www.geeksquad.fixya.com/ThreadView.aspx?prdid=34218&thid=498154
Light on moterhead
Posted by Arnold2 on Apr 08, 2008
The normal green light on the moterhead goes red and we appear to lose suction within the motor head

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure.
I checked with some of my contacts in the vacuum business and they told me that it may not be a United States vacuum and it might be a Canadian or European vacuum and may not be customer friendly to service, if you have a contact with a MAC or Snap On dealer or a metric auto store – as far as the green light on the powerhead the green light is supposed to let you know if the carpet is clean and the red light is supposed to be that the carpet is dirty, and laos it could be that your belt is loose and needs changing – a suggested belt change is every 4 to 6 months --- show them the screw and they might have something to fit or release the screw head, as per the removing of the wheel and replacing the electric cable, check with your local vac dealer or you may want to check with the Dyson dealer website and or phone # listed below:
http://www.dyson.com/homepage.asp
Contact Us
1-866-MY-DYSON
(1-866-693-9766)
Dyson Customer Care is available 7 days a week.
· Mon - Fri: 7am - 8pm, CST
· Saturday: 8am - 6pm, CST
· Sunday: 9am - 6pm, CST
[email protected]
Don – The Vac Man
Go Ahead. Use Us.

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.

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.

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.