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    viknik57's Avatar
    viknik57 Posts: 1, Reputation: 1
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    #1

    Jun 4, 2010, 04:52 PM
    My central air makes a grinding noise right before it comes on and before it goes off
    My c/a has been running fine, but it makes a few second grinding noise right before it comes on and right before it goes off. The unit itself is only 2 years old, but my furnace is pretty old. Is this something I should be concerned about.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Jun 4, 2010, 04:56 PM

    Sounds like it is getting liquid back at the compressor, or the unit is over charged
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