Display shows E16; unit runs but brush speed is limited or erratic.

Safety first: Unplug the unit and remove the brush access cover.

• Inspect brush shaft magnet: Some Electrolux models use a small magnet on the brush shaft for speed sensing. Ensure it is still attached and not cracked.
• Clean sensor area: Locate the speed sensor near the brush end. Clean away dust and fibers that may interfere with sensing.
• Check wiring: Follow the sensor wires to the main board. Reseat connectors and look for damage.
• Test sensor: Using a multimeter or oscilloscope (for advanced users), verify that the sensor outputs pulses when the brush is rotated by hand. Replace the sensor if no signal is present.
• Control board: If sensor and magnet are good but E16 persists, the brush speed control circuit on the PCB may be defective and require board replacement.