Having problems with your Dyson D.C. 33 ?

How do I fix a high-pitched whistling noise

My Dyson makes a high-pitched whistling noise when vacuuming the floor

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Repair Help & Product Troubleshooting for Dyson D.C. 33

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Bissell lift off vacuum about 4yrs old. Extremely noisy. OK until before Christmas but getting worse every time it's used. Washable filters washed, HEPA filter replaced. brush bar cleaned of every scrap, hose empty,everything that can be cleared has been. Noise high pitched, screeching and can only bear to use it for a few seconds at a time. Suction OK. Mine is so loud I can't use it very long-high pitch screech. Can this be fixed or does the whole vacuum need to be replaced? It still cleans gr


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