The red light constantly flashes and it's not picking up lint from the floor - almost like there's no suction. I've cleaned it out, still... What gives??

Faulty item contact retailer for repair or replacement

Often times when people bring a vac in for repairs and say it has no suction at the floor it has good suction but not good agitation. Make sure the belts in the clutch are new (some people are selling used clutches with stretched out belts) and the brush roll is good. If the agitation from the brush roll is not good it will not pick up even light soils like hair and lint.

The Dyson system is designed to operate the hose with the handle in the upright position. When the head is tipped down (floor vacuum position) it closes the opening to the hose/wand

Try the following suggestions to see if you can get your machine suctioning properly:

1) Remove the Tank-in-Tank Assembly and place your hand over the motor intake valve. This valve is located next to the Floor Nozzle gasket (at the top of the Floor Nozzle window) and behind the SmartMix Bottle. If you feel vacuum-like suction at this area, your suction power of the unit is working but air is escaping at some point. If there is no suction at the motor intake valve your machine will need to be inspected by an Authorized Service Center Technician.
2) It is possible the Floor Nozzle on your machine is inserted incorrectly. This would directly affect the suction of your machine. Please follow the directions below for removing and replacing the nozzle.
Before starting, please be sure the machine is unplugged and the machine handle is reclined.
To remove the Floor Nozzle window, first detach the Phillips head screws located at the base of the nozzle. Then, remove the Tank-in-Tank Assembly. Next, pull forward at the top of the Floor Nozzle window to release the tabs of this window from the receiving holes of the machine. This window is designed to allow access for cleaning.
When replacing the Floor Nozzle window, please be sure the tabs at the TOP of the nozzle are properly inserted into the receiving holes provided. If you do not have the tabs in place properly, the suction power of the machine could be affected.
Rotate the window down into place and replace the screws.
3) Ensure that the Ready Tools knob (diverter knob) is in the proper setting and the valve opens and closes freely. Ensure the black foam gasket is in place under the valve.
4) Check to ensure the Tank-in-Tank assembly is seated properly and that it is not full of dirty water. (If this tank has a drain cap, make sure it is in place and that it has a black o-ring).
5) Check the float and baffle to ensure they are properly installed on the Tank-in-Tank. The larger square portion of this part should be below the clear baffle of the tank with the red flag portion of the float resting on top of the baffle.
6) Check the Tank-in-Tank and lid for damage. Is the lint screen clogged? Make sure the lint screen is in place on the tank lid and not placed into the motor duct. Also, clear the holes on the lint screen.
7) Check to see if the upholstery hose has suction. If the hose has suction and the floor nozzle does not, check the diverter valve to see if it opens and closes freely. This can be seen through the Floor Nozzle window as you switch the diverter knob from the floor to tools setting.

Trythe following suggestions to see if you can get your machine suctioning properly:

1) Remove the Tank-in-Tank Assembly and place your hand over the motor intake valve. This valve is located next to the Floor Nozzle gasket (at the top of the Floor Nozzle window) and behind the SmartMix Bottle. If you feel vacuum-like suction at this area, your suction power of the unit is working but air is escaping at some point. If there is no suction at the motor intake valve your machine will need to be inspected by an Authorized Service Center Technician.
2) It is possible the Floor Nozzle on your machine is inserted incorrectly. This would directly affect the suction of your machine. Please follow the directions below for removing and replacing the nozzle.
Before starting, please be sure the machine is unplugged and the machine handle is reclined.
To remove the Floor Nozzle window, first detach the Phillips head screws located at the base of the nozzle. Then, remove the Tank-in-Tank Assembly. Next, pull forward at the top of the Floor Nozzle window to release the tabs of this window from the receiving holes of the machine. This window is designed to allow access for cleaning.
When replacing the Floor Nozzle window, please be sure the tabs at the TOP of the nozzle are properly inserted into the receiving holes provided. If you do not have the tabs in place properly, the suction power of the machine could be affected.
Rotate the window down into place and replace the screws.
3) Ensure that the Ready Tools knob (diverter knob) is in the proper setting and the valve opens and closes freely. Ensure the black foam gasket is in place under the valve.
4) Check to ensure the Tank-in-Tank assembly is seated properly and that it is not full of dirty water. (If this tank has a drain cap, make sure it is in place and that it has a black o-ring).
5) Check the float and baffle to ensure they are properly installed on the Tank-in-Tank. The larger square portion of this part should be below the clear baffle of the tank with the red flag portion of the float resting on top of the baffle.
6) Check the Tank-in-Tank and lid for damage. Is the lint screen clogged? Make sure the lint screen is in place on the tank lid and not placed into the motor duct. Also, clear the holes on the lint screen.
7) Check to see if the upholstery hose has suction. If the hose has suction and the floor nozzle does not, check the diverter valve to see if it opens and closes freely. This can be seen through the Floor Nozzle window as you switch the diverter knob from the floor to tools setting.

Possible Causes Remedies

ReadyTools Dial may be at the wrong setting for the cleaning job <> Set ReadyTools <> Dial to either Tools / PreTreat or Floor Cleaning.

Nozzle Window may not be properly attached. <> Press down firmly on the black oval gasket at the top
Window to make sure the two tabs on the back of the Nozzle Window are snapped into the mating slots in the main housing.

Tank-in-Tank lid is not installed <> Re-install lid;

Tank lint filter is blocked <> remove all lint and debris from Tank lint screen.

Tank-in-Tank is not properly seated. <> Tank-In-Tank must be firmly seated to function; remove
and reseat Tank-in-Tank.

Poor tool position (Hand held attachments only). <> Adjust angle; apply more downward pressure.

Tank-in-Tank has picked up maximum dirty water <> Empty Tank-in-Tank

Front Clear Floor Nozzle Window ids blocked <> Remove window and clean all fibres and debris then replace.

Insufficient suction <> Clean Pre and Post Motor Filters.

Your suction problem is most likely due to a clogged lint filter. It is located in the top clear plastic section. This is the one with the dial to switch from floor to tool mode. On the underside of this section is a small (1 inch square) red plastic piece with a door on it. Flip open the door and you will probably find that it is all clogged. Clean it out and you should have suction again.

The water should be picked up fairly rapidly into the area surrounding the clean water bladder. Try checking the lint filter to fix your suction problem. It is located in the top clear plastic section (the one with the dial to switch from tool to floor use). One the under side of it there is a small (1 inch square) red filter with a little door on it. Flip open the door and it is probably clogged with hair, carpet fibre. etc.. Clean it out and you should have suction.

Try checking the lint filter. It is located in the top clear plastic section (the one with the dial to switch from floor to tool use) and is a small (1 inch square) red plastic filter with a door on it. Flip the door open and it is probably clogged with hair, carpet fibre, etc.. Clean it out and hopefully you will have suction once again.

Like everyone else (!) your lint filter is probably clogged. It is located on the top clear palstic section (the one with the dial to switch from tool to floor use) and is on the underside. It is a small (1 inch square) red plastic filter with a little door on it. Flip the door open and you will probably find it is clogged with hair, carpet fibre., etc.. Clean it out and you should have suction again.