The brush bar motor or one of the switches may be defective. If the brush is not spinning it will not pick up anything from carpet leading many to think it has no suction. Feel for suction down by the brush bar. If you have no suction it may have a clog or need new filters. Make sure the changeover valve that switches suction from floor to tools is working properly.
SOURCE: vacuum turns on and suction
If you hear the motor in the head running and the beater bar isn't rotating, you probably need a drive belt. With the power off, make sure you can rotate the beater bar freely by hand, if it isn't bound up.. then locate and remove the baseplate screws to gain access to the beater bar itself, you'll see a drive belt pulley system and chances are, a broken belt. Replace it with a new one by pulling the beater bar assembly out of the housing and plcing the belt onto the motor shaft pulley as well as the beater bar pulley.. nest the beater bar back into the holder and reinstall the cover. Hope that helps !
SOURCE: beater bar on Dyson upright won't turn when handle is lowered
I have finally fixed my sister's dyson dc 15 beater bar problem. It was just 2 tiny broken wires connect to circuit board lead to the beater bar. The wires broke where they go through the black rubber gommet. You need a torx screwdriver tx 15 to remove 2 plastic covers to access the wires. When looking at the front of the vacuum, the gray covers located on the right side of the vacuum. 1 big cover with a black rubber gasket and other small gray cover is on the rotating ball area.
This my new year resolution is to warn people not to buy Dyson vacuum cleaner ( Junk) design to break down! Shame on you Dyson!!!! Save your money find good old vacuum cleaner with metal parts.
OLD IS IN NEW IS JUNK!
Happy New Year!
SOURCE: dyson DC 14 lost suction to beater bar/ suction to hose/stick
My Dyson DC14 had no suction...see if this works...turn the Dyson upside down...there is a length of hose that connects the bottom of the vacuum to the top, careful remove one end of the hose and check for debris...mine was clogged. Removed the clog and voila...it works. Thanks for the above info on checking the hose for cracks.
SOURCE: Bissell Beater brush sporadic
I was having the same problem with my Healthy Home vac and happened to read a solution to another question on this site posted by someone with the user name "9008". I followed his suggestion and my vac works great again. There is a screw on the back of the handle near the cord holders that can loosen up over time. When this screw is loose, the brush switch (and therefore the brushes) do not work properly. I'm not sure why this little screw causes such a big problem, but it does. To find this screw, look on the back of the handle, it's on the edge, kind of behind the hose. You should see a triangle with a Phillips screw-head symbol embossed in the plastic. Tighten this screw gently (careful not to over-tighten and strip it!). Also, not a bad idea to tighten the other screws...I found many of mine to be quite loose. Hope this helps!!
If that is closed check the long metal wand. Disconnect from the beater bar head and check the whole length of the wand and look into the beater bar head opening for something plugging it.
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