dyson ball animal 2 brush bar not spinning on carpet

Diagnosis

The failure of the brush bar to spin on the Dyson Ball Animal 2 is typically caused by one of three things: a tripped electronic overload protection system, a mechanical jam, or a failed drive belt. The most common culprit is the "brush bar jam" safety feature. When the agitator encounters a heavy object—like a stray sock, a thick rug tassel, or a clump of pet hair—the motor detects an amperage spike and automatically shuts down the brush motor to prevent the internal circuitry from overheating or burning out. If the vacuum still provides suction through the hose but the brush bar is stationary, the issue is isolated to the cleaner head's drive system. You can confirm a mechanical jam by attempting to rotate the brush bar manually (while unplugged); if it feels rigid or "stuck," there is a physical obstruction. If it spins freely but won't engage when powered on, the belt has likely snapped or slipped off the drive gear, or the electronic switch on the handle is malfunctioning.

How to Fix It

Follow these precise steps to restore brush bar rotation:

1. Power Down: Completely unplug the vacuum from the wall outlet to avoid accidental activation during the cleaning process.
2. Check the Handle Switch: Locate the brush bar ON/OFF switch on the left side of the handle. Toggle it back and forth several times to ensure the switch isn't stuck in a neutral position.
3. Access the Brush Bar: Lay the vacuum flat on its back. Use a coin or a flat-head screwdriver to turn the locking mechanism on the side of the cleaner head counter-clockwise.
4. Clear the Agitator: Slide the brush bar out of the housing. Use a pair of heavy-duty scissors or a seam ripper to cut through the hair and threads wrapped around the brush bar. Be careful not to cut the bristles or the belt. Ensure you clear the debris from the ends of the bar where the bearings sit, as hair buildup here often causes the motor to seize.
5. Inspect the Belt: Check the rubber drive belt. Ensure it is seated correctly in the grooves of the motor drive gear and the brush bar axle. If the belt is loose or frayed, it must be replaced.
6. Reassemble and Test: Slide the brush bar back into the head and lock the mechanism. Plug the unit in, set the suction control slider (located on the front of the head) to the middle position for standard carpet, and toggle the handle switch to ON.

If That Didn't Work

• Reset the Thermal Cut-out: If the motor overheated, the thermal fuse may have tripped. Unplug the machine and leave it powered off for at least 60 minutes. This allows the motor to cool down and the electronic protection circuit to reset automatically.
• Inspect the Drive Gear: Remove the brush bar and look at the small plastic drive gear on the motor. If the teeth are stripped or the gear is cracked, the motor will spin, but the belt will not engage. This requires a replacement of the motor assembly.
• Check the Suction Slider: If the suction slider is set too high (Maximum) on a high-pile carpet, the cleaner head can "seal" too tightly against the floor, creating so much friction that the brush bar cannot overcome the resistance. Move the slider to the lowest setting and see if the bar begins to spin.
• Test the Handle Switch Wiring: If the brush bar doesn't spin but the vacuum runs, there may be a break in the wiring running from the handle switch down to the cleaner head. Gently wiggle the cable near the handle while the machine is on; if the brush bar flickers on and off, the internal wiring is frayed and needs replacement.

Heads Up

• Avoid "Wet" Vacuuming: Never use the Ball Animal 2 on damp carpets. Moisture can cause the belt to slip or cause the brush bar bearings to rust, leading to permanent motor failure.
• Regular Maintenance: Cut hair off the brush bar every two weeks. Allowing hair to build up in the bearings creates friction that forces the motor to work harder, shortening the lifespan of the drive belt.
• Hard Floor Caution: Always turn the brush bar OFF when switching to hard floors. Running the agitator on hard surfaces causes unnecessary wear on the belt and can scratch delicate flooring.