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![AC compressor knocking noise when turned on, noticeable only at idle and low speed. The AC works completely fine otherwise : r/MechanicAdvice AC compressor knocking noise when turned on, noticeable only at idle and low speed. The AC works completely fine otherwise : r/MechanicAdvice](https://external-preview.redd.it/jpCr7rRrupJj3P4d04upj4gS6dBjMol57i7q9zCNSa4.png?width=640&crop=smart&format=pjpg&auto=webp&s=060585048a5952c42bec274def561da2b7f58cb9)
AC compressor knocking noise when turned on, noticeable only at idle and low speed. The AC works completely fine otherwise : r/MechanicAdvice
![Amazon.com: RYC AC Compressor and A/C Clutch EG151 (ONLY Fits Ford F-150 4.2L 1997-2006; Ford F-150 Heritage 4.2L 2004. Does Not Fit 4.6L Models) : Automotive Amazon.com: RYC AC Compressor and A/C Clutch EG151 (ONLY Fits Ford F-150 4.2L 1997-2006; Ford F-150 Heritage 4.2L 2004. Does Not Fit 4.6L Models) : Automotive](https://m.media-amazon.com/images/I/41BN5qBZz5L._AC_SY580_.jpg)
Amazon.com: RYC AC Compressor and A/C Clutch EG151 (ONLY Fits Ford F-150 4.2L 1997-2006; Ford F-150 Heritage 4.2L 2004. Does Not Fit 4.6L Models) : Automotive
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![here's a video of my AC compressor rattle. blows cold air but as long as it's on it's making this noise. clutch seems to be fine and there's no visual knocking from here's a video of my AC compressor rattle. blows cold air but as long as it's on it's making this noise. clutch seems to be fine and there's no visual knocking from](https://external-preview.redd.it/GfUvOIH7y1SSsRz_HiR9D9Ac2_8R9w7BKqtjFhzh294.png?format=pjpg&auto=webp&s=878d6cf9cc731c436eb887314168c082d1b53926)