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My central air conditioning has begun to make a high-pitched whistling sound whenever the compressor outside is on.

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  • ericutsler May 27, 2010

    The central air unit is fairly old but has never whistled like this before...very annoying!

  • ericutsler May 27, 2010

    Thanks...I'll give it a try!

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Hello my name is Heath it will be my pleasure to assist you. First thing check the filter inside the house to be sure it is not plugged. Most times the whistling is from restricted air flow. Also if the whistling is coming from the outside unit then use a garden hose to spray through the outside unit coil. Make sure the unit is off and use the hose on jet and spray the water through the fins on the coil outside.

Posted on May 27, 2010

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Hi! May I ask how old is your air conditioner? The whistling sound is kinda normal specially when its old. No need to worry. Hope this shed some light.

Posted on May 27, 2010

  • dj_relly999
    dj_relly999 May 27, 2010

    Try replacing the oil, may resolve the noise.

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