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Flushing an Automotive AC System

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  • #16
    AC is still working fine.
    I guess the noise is expanding freon rather than a compressor noise.
    After opening the hood and listening to the compressor, it sounds smooth and quiet.

    This was an experiment in flushing the AC system with denatured alcohol rather than expensive store bought flushing agents.
    At this point I would call it a success and will go this route again in the future.

    A GALLON of denatured alcohol was $20 and did the heavy lifting in removing metal and other debris in the system.
    I used ONE quart of commercial flush compound after the denatured alcohol flush.

    If you are a DIY person, please don't forget to flush your new evaporator core, like I did this time.
    Save yourwself tons of headache.

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