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  1. #1

    Condenser shutoff

    I do apartment maintenance. the property I work at is only 124 units. 1.5 to 2 ton goodman units. property was built in 1999. most units are original. several are 2-3 years old. on several condensers, at shut off they click multiple times, at the contactor, kinda like a short cycling sound. otherwise they cool just fine. since some of the units are only a year or two old and some are the old originals that do this, I was looking for a little insight as to what the problem might be. Thanks for any advise you have to offer!!!
    Last edited by job_security; 08-22-2009 at 12:00 AM.

  2. #2
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,269
    It sounds to me like mercury sloshing around inside of the thermostat. That is the only idea I could come up with. If this is the problem, you (or your hvac contractor) could add a time delay relay to the cooling circuit or install better thermostats that don't do this.

  3. #3
    Join Date
    Aug 2001
    Location
    forney texas
    Posts
    17,890
    if they are cooling find, I would not go sniffing for problems

  4. #4
    Join Date
    May 2000
    Location
    Urbandale IA. USA
    Posts
    4,913
    I would agree with amoniadog.
    The chattering of the contactor can cause premature failure of the contactor (sticking, burn out, etc), and indicates that something else may be needing attention.
    The time delay will resolve the chattering and would be less expensive than replacing Tstats.
    On the other hand the mercury bulb type Tstats are more problematic than the better digital stats.
    Those who dance, appear insane to those who do not hear the music.
    Those who believe, appear ignorant to those who do not know God.

  5. #5
    Join Date
    Nov 2004
    Posts
    1,032
    Quote Originally Posted by job_security View Post
    I do apartment maintenance. the property I work at is only 124 units. 1.5 to 2 ton goodman units. property was built in 1999. most units are original. several are 2-3 years old. on several condensers, at shut off they click multiple times, at the contactor, kinda like a short cycling sound. otherwise they cool just fine. since some of the units are only a year or two old and some are the old originals that do this,

    They should still be under warranty. I would call the installing contractor
    I was looking for a little insight as to what the problem might be. Thanks for any advise you have to offer!!!
    To say this again If it ain't broke don't fix it

  6. #6
    Join Date
    Jul 2009
    Location
    Houston,TX
    Posts
    25
    I think a time delay is always a good thing to have but If the problem is the mercury bouncing in the thermostats the delay could cause a problem on start up. Had one that would bounce on the call for cooling so the delay would not let it restart for five minutes. If your thermostats have mercury it's worth a try to replace one or two & see if that helps.

  7. #7
    Join Date
    Jul 2001
    Posts
    3,112
    Not a DIY site.

  8. #8
    They are Gooman units, be glad they work at all.big2
    Hey cockroach, don't bug me!

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  9. #9
    Join Date
    May 2000
    Location
    Colorado flatland native
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    15,067
    You guys are just frickin guessin. You aint seen the job or heard the sound. When did this become a DIY Info site??? tuss2
    My doctor gave me six months to live, but when I couldn't pay the bill he gave me six months more.
    Walter Matthau

  10. #10
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    18,213
    Quote Originally Posted by job_security View Post
    I do apartment maintenance. the property I work at is only 124 units. 1.5 to 2 ton goodman units. property was built in 1999. most units are original. several are 2-3 years old. on several condensers, at shut off they click multiple times, at the contactor, kinda like a short cycling sound. otherwise they cool just fine. since some of the units are only a year or two old and some are the old originals that do this, I was looking for a little insight as to what the problem might be. Thanks for any advise you have to offer!!!
    If the extent of your maintenance background precludes your being able to correctly deal with this issue, you should sub out this work to a qualified contractor who will no doubt cover the bases mentioned here and may have additional insights because he will have been on-site and able to more fully detail his investigation.

    That's the only advice that is worth mentioning here.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  11. #11
    High and mighty ac "pros" kiss my ass this site is a joke!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  12. #12
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    18,213
    Quote Originally Posted by job_security View Post
    High and mighty ac "pros" kiss my ass this site is a joke!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    Perhaps not as funny as a maintenance man trying to fix ac over the internet, eh?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  13. #13
    Join Date
    May 2000
    Location
    Colorado flatland native
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    15,067
    Quote Originally Posted by job_security View Post
    High and mighty ac "pros" kiss my ass this site is a joke!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    What a great line. From lyle lovett....

    "The mystery masked man was smart
    He got himself a Tonto
    'Cause Tonto did the dirty work for free
    But Tonto he was smarter
    And one day said Kemo Sabe
    You can Kiss my ass I bought a boat and
    I'm going out to sea"


    BTW Job Security, were not bein high and mighty. Heres Rule #2 from the site rules. Were not pricks, we just assume people actually read these.
    2. Do-It-Yourself (DIY) - not here.

    This site is for industry professionals and folks seeking HVAC/R advice and knowledge. Please do not ask for step by step instructions on purchasing, installing or repairing your own equipment. This is our job and our livelihood. We are generous, but not to a fault.

    Questions of this type will not be answered and may be deleted at the discretion of the Moderators.
    My doctor gave me six months to live, but when I couldn't pay the bill he gave me six months more.
    Walter Matthau

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