If you have thoroughly cleaned the brush and the E4 code still appears:

: If the roller was recently cleaned and not snapped back in correctly, the sensor may trigger E4 because the brush isn't rotating as expected. What if the Error Persists?

: Vacuuming over loose fabric (like curtains or rug edges) can jam the mechanism.

An on your Philips SpeedPro Max (or 8000 Series) cordless vacuum means that the roller brush is blocked and cannot turn freely .

: Switch off the appliance immediately to prevent motor strain.

: Press the "easy button" on the side of the 360° suction nozzle or mini Turbo brush to release the roller. Clear Debris : Pull out any large clumps of dust, fluff, or dirt by hand.

Slide the brush back into the nozzle and snap the locking lever into place.