Hoover U6630-900 WindTunnel Bagless Upright Vacuum\015 I had a big clog in mine and took the back off to clear it. Ever since I reassembled it, the embedded dirt light has stayed on red, all the time. I took it apart again and the light will switch to green when I put my finger over the small metal sensor then remove it. Where should the little metal sensor be when the unit is reassembled?\015

How to Identify and Fix Common Vacuum Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced Vacuum Technicians :

Partially Red Performance Indicator

If the indicator is turning red partially or slowly then you may need to clean any of the three filters this vacuum has, as they are causing a decrease in suction. The first of the two main filters, the dust filter, should be cleaned every 2 months.

This usually occurs if the dust cannister is too full or the filters are clogged and the motor wasn`t getting enough cooling air passing over it.
Blockages or dirty filters may cause this to happen, the safety cut off will activate and switch off the electrical supply. If the cleaner has cut out, simply unplug and check for a blockage or dirty filters.
As the owner`s manual explains, a solid red light means it`s a problem with the blower motor. A steady blinking red light means there`s a problem with the accessory attached to the Rainbow. More details can be obtained from the unit, as well as the Rexair service diagnostic app.
Pulsing red:

The battery needs to be charged. Leave the robot on the base. If it`s still not fully charged after 3 hours visit Why does my Roomba® or Braava® not turn on or charge properly?

Check that the vacuum cleaner is plugged into a working power outlet and that fuses and breakers don`t need resetting. An activated thermal cut-out due to a blockage is the next most likely cause of the problem. Check for blockages in the hose and filters, and remove any obstructions that you find.
Stick Vacuum Not Running

First make sure you have charged your device. If the vacuum still will not turn on after that, try to unplug the vacuum charger from the outlet. Leave the charger unplugged for at least 1-2 minutes. Next, turn on the stick vacuum and let run until the battery completely drains.

A thermal cut off is a heat-sensitive device that automatically disconnects the power to a vacuum`s motor when the operating temperature exceeds a safe value.
If there is a blockage or build up of debris around the brush roll preventing it from turning, then the power will automatically stop and the charge light will flash red.
If it is a lithium ion battery then yes it can stay plugged in all the time. But if it is a nickel metal hydride then it should be run down, charged fully and then unplugged. Lithium batteries do not get a memory so they can be charged no matter what the state of charge is.
Short answer, the manufacture decides to either to add or not add a light. A light does help in showing if the carpet is clean or not. Most older vacuums and many higher priced vacuums have lights.
The water is the fluid which traps every dust and dirt particles that come into the Rainbow, Running your Rainbow without water allows all these particles pass into the Rainbow internal parts, and also clogging your HEPA filter, which is designed to be a backup filter to work together with the water.
If you are using a Vax Blade 24V Cordless Vacuum Cleaner or a Vax Blade 32V Cordless Vacuum Cleaner and the brushbar has been obstructed, the motor protection sensor may have been activated. The brushbar will stop and the light on the Powered Head will illuminate red.
If the indicator light is flashing red, the thermostat is overheating. To reset the thermostat, turn off and unplug the vacuum. Empty the dust cup and filter and assure there are no blockages in the hose. Allow the vacuum to cool for at least 45 minutes before turning it back on.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Embedded light sensor stays red all the time
ANSWER : The back cover is called the a micro/dust assembly. See #21 here:
.http://www.ereplacementparts.com/hoover-u6630900-windtunnel-selfpropelled-bagless-vacuum-parts-c-37315_37337_37584.html
.
.
.The little sensor should be in the round recess in the top of that assembly. When you are putting the cover back on you have to use a pair of needle nose pliers to push the sensor into the round recess until it is snug. It is hard to do because the wires to the sensor are very short and you have to be careful not to break the wires on the sensor. The sensor is a little microphone that senses the noise of the dirt going through the EDF. The first time I did mine I didn’t push it in hard enough and came out of the EDF recess and fell inside the vacuum body.

Dirt finder I have a Hoover U6439-900.  After the cleaner was used a few times, the dirt finder light cycles between green and red on the regular setting and will not go to green.  On the sensitive setting, the red light stays on most of the time.  I have tried to run the cleaner to remove any dirt but have not solved the problem.
ANSWER : 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.

Electrolux Epic 6500SR Full Bag sensor working, Does not Reset properly
ANSWER : The problem was a sticking switch that was not being reset. The vacuum on/off switch mechanism is comprised of two switches. One is the main switch that turns the vacuum on and off. The second is a shut off switch that gets tripped when the full bag sensor is engaged. This second switch is supposed to get reset when you push the on/off switch on the outside of the machine. The full bag shutoff switch was stiff and it, therefore, was taking a couple of presses of the on/off switch to move the shutoff switch back into the running position.

Sensor light stays red no matter how long I vacuum. I think the sensor light is broken.
ANSWER : I think you have a clog and/or a dirty filter.
.
.Check all hoses – dont just look at them … disconnect them – run something through them – check completely. I pick up dozens of discarded machines from the trash heap – more than 90% have clogged hoses and nothing else wrong with them.
.
.I hope this helps
.
.a

I have a Roomba 560 (it’s still in warranty !!) and, after my summer vacation, it has a problem.
When I’m charging Roomba, the orange light blinks (and this is normal!) but this orange blinking continues forever…. the light doesn’t change to green.
If I detach Roomba from the charger, the light become green and it works normally until the light changes to red and I have to charge it again.

WHY, DURING THE CHARGING PHASE, THE LIGHT DOESN’T CHANGE FROM ORANGE-BLINKING TO GREEN?

HAVE I

ANSWER : The problem is not with the charger itself but it is with the battery inside the Roomba. It sunds like one or more of the cells has gone bad so its not holding the same charge as it did. I would recomend sending it in while the warranty is still valid so they will replace it. Your charger and the Roomba itself should be fine.

A few tips to keep the battery working longer:
Only charge the battery when it is drained all the way to zero. It will help keep the battery active.

Only charge the battery until it is full and then disconect it from the power source. It will keep it active longer plus it will help keep your electric bill down.

Hoover – Red Light Dirt Sensor
ANSWER : 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

Red light stays on
ANSWER : 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.

I have a Casa Blanca Intelitouch ceiling fan.
Panama5
12004T model no.??
serial no.: AU16550
A casa blanca tri-switch on the wall: lights-fan-power

When I turn it on, the lights and fan work fine.
After a period of time, the lights go off by themselves.
I don’t remember the fan ever going off by itself, only the lights.

ANSWER : The light are going off only because after a period of time the circuit lets off the trigger on the switching thyristor. So the fault is within the control box of the unit which must be taken out to confirm.
.Now attempt to do the job only if your are competent with high voltage circuits as the circuit must be checked before and after the lights switch off.
.It is also possible that the switching device the thyristor may be on dry soldering joint. So with the mains power off( or the power disconnected to the unit) have yourself insulated , use a soldering iron to touch up all the joints.
.Failure of capacitors in the trigger circuit is also possible to have this delay off.
.Trace the trigger voltage cut off at this point to come to the solution.( use a multimeter)