Miele Restricted Airflow / Clogged Filters

Robot vacuum runs but has very weak suction; it picks up little debris even on hard floors.

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Possible Causes

Clogged pre-motor filter, Blocked suction inlet, Dust bin overfilled, Partially blocked air duct

How to Fix / Troubleshooting

Safety first: Turn the robot OFF and remove it from the dock before cleaning filters or the bin.

Steps:

  • 1. Empty dust bin: Remove and empty the bin completely. Tap it gently to dislodge fine dust.
  • 2. Clean or replace filters: Remove the pre-motor and exhaust filters. Tap them gently outdoors to remove dust. Replace them if they are heavily soiled or per Miele’s recommended interval.
  • 3. Check suction path: Inspect the inlet at the brush housing and any internal ducts for blockages. Remove any debris with a small brush or tweezers.
  • 4. Inspect brush roll: Ensure the main brush is clean and rotating freely; a jammed brush reduces pickup.

When to call a technician: If suction remains weak with clean filters and clear ducts, the suction motor or fan may be worn or damaged and should be inspected by a technician.

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Repair Difficulty

Easy 2/5

Required Part

Pre-motor Filter
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