Dyson Vacuum Lost Suction: Filter, Blockage, and Seal Diagnosis

Dyson vacuums losing suction have a specific diagnostic sequence: 1) WASH THE FILTER. This is the #1 cause of lost suction on ALL Dyson models. The filter is inside the cyclone assembly (V-series cordless) or on top of the canister (ball uprights). Wash under cold running water until water runs clear. Let dry COMPLETELY for 24 hours. A wet filter restricts airflow worse than a dirty one. 2) CHECK FOR BLOCKAGES. Remove the wand, cleaner head, and inspect all airways. 3) CHECK THE BIN SEAL. The rubber gasket on the bin opening wears over time. If the seal is compressed flat, air leaks in around the bin instead of through the cyclone, killing suction. Replace the bin assembly or seal. 4) CHECK THE CYCLONE. Compressed debris can pack inside the cyclone shroud. Tap the cyclone over a bin to dislodge compacted dust. Dyson cyclones are NOT washable on most models.