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  1. #1
    Join Date
    Sep 2007
    Posts
    22

    air return whistles

    i have just recently (we've lived in the home about 6 months) noticed an annoying whistling noise in the air return vents. any ideas? the heat has been on all winter and only recently have i noticed this noise.

  2. #2
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    6,959
    Is the filter clean or have you recently changed to a different type of filter?

  3. #3
    Join Date
    Sep 2007
    Posts
    22
    about two months ago we had lennox pure air system installed with both units but i olny notice the sound upstairs. i just went into the basement and the sound is definitely coming from the furnace area--i don't know why though. i didn't notice the noise right after the air cleaners were installed though.

  4. #4
    Join Date
    Mar 2001
    Posts
    1,213
    Call for service.

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