Safety first: Unplug the unit and allow it to cool for at least 30 minutes before inspection.

Clean air paths: Check all air intake grilles and exhaust vents on the AEG cleaner body. Use a soft brush and vacuum to remove dust, lint, and pet hair.
Check filters: Remove and inspect the motor pre-filter and exhaust filter (HEPA or foam). Wash or replace according to the user manual. Severely clogged filters can cause overheating.
Inspect for blockages: Remove hose, wand, and floor nozzle. Ensure there are no clogs in the suction path that could strain the motor.
Check cooling fan (if separate): Some models have a dedicated cooling fan. Verify that it spins freely and is not obstructed. Replace if seized or noisy.
Test temperature sensor: If accessible, measure the resistance of the motor temperature sensor (NTC) at room temperature and compare with AEG specifications. Replace if out of range.

Repeated E8 errors after cleaning and cooling may indicate a failing motor; consider replacing the suction motor assembly.

Carpet cleaner shows E8 and shuts down shortly after starting; may be accompanied by a hot smell from the base.

Possible Causes