Results 1 to 13 of 13
  1. #1
    Join Date
    May 2009
    Posts
    26

    Condensing unit - clunking noise when shuts off

    Hi, I just noticed that my outdoor unit is making a louder than what I believe is normal clunking noise when it shuts off.

    Is this cause for concern? The (Carrier) unit it slightly over 1 year old and otherwise, works fine . . .

    Thanks!

  2. #2
    Join Date
    Dec 2006
    Location
    Pinellas County, Fl
    Posts
    78
    I would call a pro on this one, there may be problems with the compressor that if caught in time could save it
    Improvise, Adapt and Overcome

  3. #3
    Join Date
    May 2009
    Posts
    26
    The tech came out and said everything was fine. Explained that is was the pressure equalizing instantly (something like that).

  4. #4
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,879
    did he make sure the fan blade set screw was tight

  5. #5
    Join Date
    Dec 2007
    Location
    Cedar Grove, Wi-Sheboygan
    Posts
    1,582
    sure it wasn't the duct work you were hearing making the noise from expanding and contracting form the heat and cool air? When the heat kicks in the duct works expands, and shortly after the heat turns off the duct work will contract.

  6. #6
    Join Date
    May 2009
    Posts
    26
    Quote Originally Posted by catmanacman View Post
    did he make sure the fan blade set screw was tight
    No

  7. #7
    Join Date
    May 2009
    Posts
    26
    Quote Originally Posted by DanW13 View Post
    sure it wasn't the duct work you were hearing making the noise from expanding and contracting form the heat and cool air? When the heat kicks in the duct works expands, and shortly after the heat turns off the duct work will contract.
    Yes, I am sure. It was/is clearly a noise coming from the outside unit.

  8. #8
    Join Date
    Dec 2007
    Location
    Cedar Grove, Wi-Sheboygan
    Posts
    1,582
    Has to be the line sets coming into the house then, check the lines when the OD unit is running and also check the line inside

  9. #9
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    Is this a heat pump?
    Remember, Air Conditioning begins with AIR.

  10. #10
    Join Date
    May 2009
    Posts
    26
    Quote Originally Posted by Kevin O'Neill View Post
    Is this a heat pump?
    No.

  11. #11
    Join Date
    May 2009
    Posts
    26
    Quote Originally Posted by DanW13 View Post
    Has to be the line sets coming into the house then, check the lines when the OD unit is running and also check the line inside
    The lines going into the house or out . . . What is the difference? The sounds is heard when standing outside next to the unit and comes from within.

    It is not a continuous noise - The compressor is just making a "louder than I remember" noise as soon as it shuts down.

  12. #12
    Join Date
    Aug 2008
    Posts
    322
    What kind of compressor does it have? If it has a scroll it could be turning backwards untill pressure equalises.

  13. #13
    Join Date
    May 2009
    Posts
    26
    Quote Originally Posted by mike robinson View Post
    What kind of compressor does it have? If it has a scroll it could be turning backwards untill pressure equalises.
    I've not a clue. Whatever comes stock new in Carrier Performance series units.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event