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  1. #1
    Join Date
    Aug 2011
    Posts
    19

    Is a compressor suppose to do this?

    Long time lurker, first time poster. Hi!

    I live in Dallas TX, 2200 sq ft house. I just had a completely new outside and inside unit put in my home this spring.

    5 ton Trane XR15 with variable speed Trane air handler.

    Here's my question...

    Sometimes, the outside condenser unit will "start up" several times before it actually stays on. Like, it'll turn on for a few seconds, then turn off for about 10 seconds... turn on again for a few seconds, then turn off for about 10 seconds. Sometimes it does this just a couple times before starting, and other times it'll do it up to maybe 5 or 6 times before starting. Sometimes it doesn't do it at all and starts running the first time.

    Is this normal? I've never had a variable speed air handler so I'm not sure if the outside unit is suppose to be doing that or not...

    I got a 2 year service warranty so I need to know whether to call the AC company back out again (for the third time).

    Thanks!!!

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,396
    Not right.

  3. #3
    Join Date
    Mar 2011
    Location
    VIRGINIA
    Posts
    37
    Yes call your service company, and have them come out, you are in the installaion warranty period. Possibly wirea are not making good contact, call them, you will avoid further issues down the road if you don't.

  4. #4
    Join Date
    Aug 2011
    Posts
    19
    Thanks!

    I called the service company and they're coming out Monday.

  5. #5
    Join Date
    Aug 2010
    Location
    Greenwood, IN
    Posts
    34
    Yep, absolutely call them back. It should not be doing that and if it continues could severely damage your comprssor. Most likely a problem within the electrical/start system.

  6. #6
    Join Date
    Apr 2009
    Location
    San Diego
    Posts
    75
    most likely its cycling on high pressure limit. overcharge or restriction.

  7. #7
    Join Date
    Aug 2011
    Posts
    19
    So I've been paying more attention to it now that you guys all agree that it is not suppose to be doing that, and I've noticed something... When the compressor turns off after I hear the thermostat "click" (when it is suppose to I think), it shuts down smooth and quietly.

    But when it gets into it's "turn on, turn off, turn on, turn off" mode, when it shuts down it does so very loud and abruptly, like a loud and jarring click. It's actually been doing this ever since it's been installed, off and on.

    I thought it was normal. I'm such an idiot!!!

  8. #8
    Join Date
    Feb 2010
    Location
    Ontario Canada
    Posts
    1,339
    Quote Originally Posted by phatmass View Post
    So I've been paying more attention to it now that you guys all agree that it is not suppose to be doing that, and I've noticed something... When the compressor turns off after I hear the thermostat "click" (when it is suppose to I think), it shuts down smooth and quietly.

    But when it gets into it's "turn on, turn off, turn on, turn off" mode, when it shuts down it does so very loud and abruptly, like a loud and jarring click. It's actually been doing this ever since it's been installed, off and on.

    I thought it was normal. I'm such an idiot!!!
    If you were properly trained in the art of refrigeration and air conditioning you would be an "idiot"
    As a home owner you suspected a problem, you confirmed the problem, and you are doing something about it. Your far ahead of the pack in my mind.
    Never give up; Never surrender!

  9. #9
    Join Date
    Aug 2011
    Posts
    19
    I took a video of exactly what it's doing. I ran out there after I heard it start doing it again--it was probably doing this for about a minute before I got out there and figured out how to record this on my phone. haha


  10. #10
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,425
    Quote Originally Posted by phatmass View Post
    I took a video of exactly what it's doing. I ran out there after I heard it start doing it again--it was probably doing this for about a minute before I got out there and figured out how to record this on my phone. haha

    Not good. Sounds like you are short cycling on a safety. I'm not real familiar with the Trane residential line but you certainly have a problem. You might be flirting with compressor damage if you keep it up until Monday.....

  11. #11
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,506
    Is your condenser coil clean? is there any water in the overflow drain pan? that condenser motor sure sounds weird on start, but could just be the audio quality. Does it cool ok once it makes up it's mind to run?
    __________________________________________________ ____________________________
    “Reality is merely an illusion, albeit a very persistent one.” –Albert Einstein

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  12. #12
    Join Date
    Mar 2010
    Location
    Arnold, Mo
    Posts
    360
    I watched the video. Yikes! Get someone out right away!

  13. #13
    Join Date
    May 2008
    Location
    Houston
    Posts
    440
    Yea sounds like its short cycling on a safety. Could be a pressure issue. Or as stated some kind of loose wire connection.

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